network review Flashcards

Question

Which of the following is true about the impact of drawing power down a PoE cable? -It decreases the cable's resistance. -It can decrease data transmission rates. -It increases data transmission rates. -It enhances thermal performance without additional measures.

Answer 1

-It can decrease data transmission rates. Drawing power through a PoE cable increases the temperature within the cable, which can decrease the cable's ability to transmit data at high rates.

Answer 2

-Any of the links could be in a blocking state depending on the bridge IDs

Answer 3

-It broadcasts the transmission to all connected devices. Hubs do not differentiate between unicast, multicast, or broadcast transmissions. They broadcast all incoming transmissions to every connected device, regardless of the destination address specified in the transmission.

Answer 4

-EtherTypes are values of 0x0600 or greater to indicate protocol type; values less than this indicate payload length.

Answer 5

-Cyclic Redundancy Check (CRC) The Cyclic Redundancy Check (CRC), also known as the Frame Check Sequence (FCS), is a 32-bit checksum used to detect errors in Ethernet frames. By analyzing the CRC field, the tool can determine if a frame has been corrupted during transmission, making it the correct choice for this scenario.

Answer 6

-Screened Twisted Pair (ScTP) In a mixed-use building with potential for moderate electromagnetic interference (EMI) from electrical rooms and gym equipment, Screened Twisted Pair (ScTP) cabling, also known as F/UTP, offers a good balance between cost and performance. It provides a thin foil shield around all wire pairs, which helps mitigate the impact of EMI, ensuring more reliable network performance than UTP cabling without the higher costs associated with fully shielded options. This makes it a suitable choice for the company's need for reliability while being mindful of budget constraints.

Answer 7

-Install the tower servers on shelves within the racks.

Answer 8

-NIC teaming Port aggregation combines two or more separate cabled links into a single logical channel. From the host end, this is also known as NIC teaming. Auto-MDI/MDIX means that the switch senses the configuration of the connected device and cable wiring and ensures that a media dependent interface (MDI) uplink to an MDIX port gets configured.

Answer 9

-Check the ARP cache on the affected computer to see if it has the correct MAC address for the default gateway. Checking the ARP cache on the affected computer is a direct method to diagnose potential ARP-related issues. The ARP cache stores recent IP-to-MAC address mappings. If the MAC address for the default gateway is incorrect or missing, it could prevent the computer from accessing the Internet. This step helps in identifying whether the ARP process is functioning correctly or if there's an issue with the ARP entries.

Answer 10

-The route with the longest prefix wins. The correct answer is that the route with the longest prefix wins. The longest prefix match rule states that when a router has multiple paths to a destination, the path with the most specific match (longest prefix) is chosen. This ensures that the most specific route is used for packet forwarding. The shortest prefix would be less specific, and routing decisions prioritize specificity to ensure accurate packet forwarding. AD values are used to compare the trustworthiness of routes from different routing protocols, not to decide between routes with different prefix lengths.

Answer 11

-vlan 16 name VLAN16

Answer 12

-2-1001 VLAN IDs 2-1001 are considered the normal range for VLAN configuration. These IDs are available for general use in network segmentation. The 1-1001 range incorrectly includes VLAN 1, which is the default VLAN, not part of the normal range. The 1002-1005 VLAN IDs are reserved and not part of the normal range. The 1006-4094 range represents the extended VLAN IDs, not the normal range.

Answer 13

-A high-capacity appliance firewall In a scenario where a company is expanding its online services leading to a significant increase in internet traffic, a high-capacity appliance firewall is the most suitable choice. This type of firewall is designed to handle large volumes of traffic efficiently, ensuring that the network's security is maintained without becoming a bottleneck. Its dedicated hardware is optimized for high performance and reliability, making it ideal for securing a large-scale data center that hosts critical services.

Answer 14

-show route The network engineer should use the show route command to inspect the router's active routing table. This command provides detailed information about the routing table, including destinations, gateways, and the source of each route, which can help identify any misconfigurations. The show ip arp command is used to view the ARP cache, not the routing table. The ip route show command is used on Linux hosts to display the routing table, not on routers. The route print command is specific to Windows hosts for displaying the routing tables, not applicable to routers.

Answer 15

-dig @ns1.isp.example example.com MX +nocomments +nostats The dig @ns1.isp.example example.com MX +nocomments +nostats command specifically queries the DNS server ns1.isp.example for the MX records of example.com and uses the +nocomments and +nostats parameters to reduce the output to essential information only, making it the most suitable choice for the task. While the dig @ns1.isp.example example.com MX +short command correctly queries for MX records and aims to simplify the output, the +short option might overly simplify the output, potentially omitting useful details.

Answer 16

-It uses the default resolver. If dig is run without specifying a DNS server, it will use the system's default resolver to perform the query. dig does not specifically query the local host's DNS settings unless the local host is set as the default resolver.

Answer 17

-For a limited period only

Answer 18

-The client attempts to rebind the lease configuration with any available DHCP server. When the T2 timer expires, the client broadens its attempt to maintain connectivity by seeking any available DHCP server to rebind its lease, not just the original server. This is a fail-safe mechanism to ensure network access.

Answer 19

-com The TLD is the part of the FQDN that is furthest to the right before the root period, which in this case is "com". It indicates the most general part of the domain hierarchy. TLDs are categories of domains that help identify the purpose or geographic area of a domain. In this example, "com" is a generic TLD commonly used for commercial purposes. "server" is incorrect because it represents the specific host or resource within the domain, not the TLD. "department" is incorrect as it signifies a subdivision within the "company" domain, not the TLD. "company" is incorrect because it is a second-level domain under the TLD "com", indicating a specific organization or entity.

Answer 20

-The administrator should verify the OSPF area configurations to ensure that all non-backbone areas are properly connected to Area 0.

Answer 21

-1 to 254 DHCP options are identified by a tag byte, which can range from 1 to 254, allowing for a wide variety of options to be specified. 0 and 255 are reserved and cannot be used as option values.

Answer 22

-1002-1005 VLAN IDs 1002-1005 are reserved for system use and are not available for general configuration. These VLANs are typically used for specific network protocols and functions. The 1-1001 range includes both the default VLAN and the normal range, which are available for general use. The 1006-4094 range represents the extended VLAN IDs, which are available for general use on devices that support them. VLAN ID 0 is not used, and VLAN ID 1 is the default VLAN, not a reserved range.

Answer 23

-/48 Globally unique unicast addresses in IPv6 are widely referred to as /48s. This notation indicates that the first 48 bits of the address are used for network identification, leaving the remaining bits for interface identification. This allows for a large number of unique addresses within a single network. The /32 prefix is typically used for IPv4 addresses and is not commonly associated with IPv6 globally unique unicast addresses. While /64 is a common subnet size for local networks in IPv6, it is not the prefix notation specifically used to refer to globally unique unicast addresses. The /128 prefix indicates a single IPv6 address, not a range of addresses, and is therefore not correct for globally unique unicast addresses.

Answer 24

-Microscopic imperfections in the structure of the glass fiber

Answer 25

-255.0.0.0

Answer 26

-To allow internal clients access to private network resources

Answer 27

-Using a TLS

Answer 28

-Implicit TLS

Answer 29

-RTP RTP benefits most from the lower overhead and reduced latency and jitter of UDP, as it is designed for the real-time delivery of media data, where these factors are crucial. SIP is a session control protocol and can run over both UDP and TCP, but it is not specifically mentioned as benefiting most from UDP's characteristics. TCP is a protocol that provides reliable, ordered, and error-checked delivery of a stream of octets between applications running on hosts communicating via an IP network, contrasting with the characteristics of UDP. HTTP is a protocol used for transferring hypertext requests and information on the Internet, not specifically designed for real-time media delivery like RTP.

Answer 30

-Time drift Time drift is when a system's clock begins to be off by a few seconds or minutes. Using Network Time Protocol (NTP) can help reduce the risk of time drift. Slewing is an NTP correction method where the time is adjusted a few milliseconds at a time until it's correct again. Slamming is an NTP correction method where the time is hard reset to the correct time. Dispersion measures how scattered the time offsets (in seconds) are from a given time server.

Answer 31

-Check the appliance's log.

Answer 32

-Reconstructs the packet contents for a TCP session

Answer 33

-Shadow IT, where users introduce unauthorized hardware or software

Answer 34

-Inspect DNS traffic for anomalies. -Scan the network for rogue DHCP servers. The correct answers are to scan the network for rogue DHCP servers and inspect DNS traffic for anomalies. In the case of a DNS spoofing attack within a corporate network, the attacker might be using ARP poisoning to respond to DNS queries with spoofed replies or could have configured clients with the address of a DNS resolver they control via a rogue DHCP server. Scanning the network for rogue DHCP servers and inspecting DNS traffic for anomalies would help identify the source of the spoofed DNS responses, making it the most immediate and effective action to mitigate the attack. Restarting computers would not address the root cause of the DNS spoofing attack and would not prevent the redirection from happening again. While keeping antivirus software updated is a good security practice, it may not directly address or mitigate a DNS spoofing attack, as the issue lies within the network's DNS traffic or a rogue DHCP server. While enhancing firewall security is generally beneficial, it might not directly prevent DNS spoofing attacks within the network, especially if the attack originates from a compromised or rogue device internally.

Answer 35

-Malware that does not write its code to disk

Answer 36

-checkout.store.techgadgets.io

Answer 37

-Standby group

Answer 38

-The frame is dropped

Answer 39

-A complete description of the solution -A complete description of the problem -Who is responsible Including who is responsible for the ticket ensures accountability and clarity on who is handling the problem. This is crucial for follow-ups and for maintaining an organized workflow.

Answer 40

-Configure the port as an access port with a voice VLAN.

Answer 41

-Use portable Class A fire extinguishers to control the fire in the storage room. Using portable Class A fire extinguishers to control the fire in the storage room is correct because Class A extinguishers are suitable for fires involving ordinary combustibles like paper, allowing for targeted suppression with minimal risk of water damage to the server room. Activating the wet-pipe system throughout the entire building could cause unnecessary water damage, especially in areas not affected by the fire. Because the fire is not in the server room. Prematurely releasing the clean agent could disrupt server operations unnecessarily. The pre-action system is designed to fill with water upon detection of a fire, but manual activation without confirmation of heat could delay fire suppression efforts. Portable extinguishers provide immediate, targeted response.

Answer 42

-Establish a plan of action.

Answer 43

-255.255.255.192

Answer 44

-No, it is deprecated. Explanation The correct answer is no, it is deprecated. NIST's latest guidance deprecates the requirement for mixing multiple character classes (letters, case, digits, and symbols) in passwords, although many organizations still follow this practice in their password policies. NIST has moved away from recommending multiple character classes. NIST's guidance does not make exceptions for critical systems. While organizations may choose to implement it, NIST has deprecated this requirement.

Answer 45

-TACACS+, because it separates authentication, authorization, and accounting functions, offering granular control over administrative access. The correct answer is TACACS+, because it separates authentication, authorization, and accounting functions, offering granular control over administrative access. TACACS+ is the best choice for managing administrative access to network devices due to its ability to separate authentication, authorization, and accounting functions. This separation allows for more granular control over what administrators can do and provides detailed logging of their actions, which is essential for security and compliance. While RADIUS does use a shared secret, it does not offer the same level of granular control over authorization and accounting as TACACS+, making it less suitable for detailed administrative access management. RADIUS typically uses UDP for communication, not TCP. This answer confuses the communication protocols used by RADIUS and TACACS+. While TACACS+ does provide encryption, the primary reason for choosing it in this scenario is not for encrypting user data on the network but for its ability to offer granular control over administrative access.

Answer 46

-Forced proxy A transparent proxy is also known as a forced or intercepting proxy. It intercepts client traffic without requiring the client to be reconfigured to use the proxy. Direct proxy is not a term commonly used to describe a transparent proxy. Secure proxy refers to proxies that provide additional security features, not necessarily transparency. Private proxy refers to a proxy service dedicated to a single user or group, not to its transparency.

Answer 47

-By generating an enterprise certificate for each domain The correct answer is by generating an enterprise certificate for each domain. To perform TLS inspection, a proxy generates an enterprise certificate for each domain, which the client trusts as it is issued by an enterprise CA. This allows the proxy to establish its own TLS tunnel with the website, forwarding the client's requests if they conform to policy. Bypassing the TLS protocol entirely would undermine security and is not how proxies perform TLS inspection. Requesting permission from the website to inspect traffic is not a method used for TLS inspection. Using a third-party service to decrypt traffic is not the standard practice for proxies performing TLS inspection; they generate their own certificates.

Answer 48

-To restrict traffic on the external/public interface

Answer 49

-Smart building technology has less scope for compromise.

Answer 50

-Facilitation of surveillance

Answer 51

-To restrict access by technicians to their own equipment

Answer 52

-Fixed cameras with narrow focal lengths at each entry point and PTZ cameras in the central storage area

Answer 53

-A firewall with three network interfaces

Answer 54

-Anomaly-based detection The correct answer is anomaly-based detection. Anomaly-based detection in an IPS defines a baseline of normal network traffic and monitors for deviations from this baseline. While this method is effective in identifying unknown threats, it has a significant drawback: it can generate high levels of false positives, where legitimate traffic is mistakenly flagged as malicious. In this scenario, the legitimate traffic from the partner company likely deviated from the established baseline, leading the IPS to incorrectly block it as a security measure. Signature-based detection relies on predefined patterns of known malicious activities. If the traffic from the partner company was blocked due to signature-based detection, it would imply that the traffic matched a known threat signature. This is less likely to result in false positives compared to anomaly-based detection, especially for traffic that has not previously been identified as malicious. Sending a TCP reset packet is an action taken by an IPS to terminate a suspicious session. While this feature is part of the IPS's preventive measures, it is not directly responsible for the decision to block traffic. The decision to send a TCP reset packet or block traffic is based on the detection mechanisms (such as anomaly-based or signature-based detection), not the action itself. Encryption of traffic is not a function of an IPS. Encryption is used to secure data by converting it into a coded format, ensuring that only authorized parties can access the information. This feature is unrelated to the issue of legitimate traffic being blocked, which is a result of the IPS's detection and prevention mechanisms.

Answer 55

-802.11v The correct answer is 802.11v. 802.11v is a standard that includes a feature known as BSS Transition Management. This allows the network to provide guidance to clients about when it might be beneficial to move to a different access point, such as when the current one is congested. This "push" helps in balancing the load across the network and improving the overall user experience by steering clients to less congested APs. 802.11a is an earlier standard that focuses on providing higher data rates in the 5 GHz band but does not include features for managing client roaming or congestion. 802.11ac, also known as Wi-Fi 5, improves upon previous standards by offering higher throughput and more efficient data encoding but does not specifically address client steering or congestion management. 802.11n, or Wi-Fi 4, introduced multiple-input multiple-output (MIMO) technology for improved data throughput and signal range but does not include mechanisms for pushing clients to less congested APs.

Answer 56

-Replace the metal furniture with wooden furniture.

Answer 57

-Transport mode The correct answer is Transport mode. Transport mode in IPSec is designed for securing end-to-end communications between hosts on a private network. It encrypts only the payload of the IP packet, leaving the IP headers unencrypted. This mode is suitable for the network administrator's requirement to secure communication within the company's private network without encrypting the IP headers. Tunnel mode is incorrect because it is used for securing communications across unsecure networks, such as the Internet, by encrypting the entire IP packet (both payload and header) and encapsulating it within a new IP packet. This mode is more suitable for VPNs rather than internal host-to-host communication.

Answer 58

-It provides higher downlink speeds. Cable internet connections, often provided along with Cable Access TV (CATV), generally offer higher downlink speeds than DSL connections. This is due to the technology and infrastructure used, such as hybrid fiber coax (HFC) networks, which combine a fiber optic core network with coaxial links to customer premises equipment.

Answer 59

-To perform modulation and demodulation of data Modems modulate digital signals from a computer into analog signals for transmission over telephone lines or other media and demodulate incoming analog signals back into digital form.

Answer 60

-Denial of service attacks NLA protects the RDP server against denial of service attacks by authenticating the user before committing any resources to the session. This prevents malicious users from creating multiple pending connections to try to crash the system.

Answer 61

-HTML5 HTML5 introduced the canvas element, which allows a browser to draw and update a desktop with relatively little lag. This capability is crucial for clientless VPNs because it enables ordinary browser software to connect to a remote desktop or to a VPN portal without needing a separate client application. The canvas element can also handle audio, making it a versatile tool for creating rich, interactive web applications that can serve as a platform for clientless VPNs. CSS3 is used for styling web pages and cannot directly handle the dynamic rendering of desktop environments or manage connections. JavaScript is a programming language used to create interactive effects within web browsers. While it can interact with the HTML5 canvas element, it is not the technology that enables the drawing and updating of a desktop. AJAX is a technique for creating fast and dynamic web pages. It allows web pages to be updated asynchronously by exchanging small amounts of data with the server behind the scenes. However, it does not provide the specific capabilities required for rendering desktop environments in a browser.

Answer 62

-Cable Internet Cable Internet with DOCSIS 3.0 is the most appropriate choice for an online gaming enthusiast who needs low latency and high upload speeds for live streaming. DOCSIS 3.0 technology allows for the use of multiplexed channels to achieve higher bandwidth, which can support both the low latency required for online gaming and the high upload speeds needed for live streaming. Cable Internet also tends to have lower latency compared to satellite internet, making it better suited for gaming. ADSL provides asymmetrical speeds with slower upload than download, which might not meet the needs of someone who requires high upload speeds for live streaming. SDSL offers symmetrical upload and download speeds, which could be suitable, but it generally does not offer the same high speeds or low latency as Cable Internet with DOCSIS 3.0. Satellite Internet suffers from high latency due to the signal having to travel to and from satellites in orbit, making it unsuitable for activities like online gaming that require quick response times.

Answer 63

-Data Link layer At the Data Link layer, WANs often use simpler protocols than LANs due to the point-to-point nature of many WAN connections, which requires less complexity.

Answer 64

-By creating a JSON formatted request and posting it to the API endpoint

Answer 65

-A single fiber cable

Answer 66

-Using IP addresses

Answer 67

-To start a CLI for device configuration The console port is specifically designed for direct physical access to network appliances, allowing administrators to configure and manage the device via a command line interface (CLI). This is essential for initial setup or troubleshooting when network access is not available or preferred.

Answer 68

-It adds significant overhead.

Answer 69

-Setting up a dedicated physical network for device management, separate from the production network A true out-of-band management setup involves having a completely separate and dedicated channel or network for managing devices, which ensures that management access is not affected by issues on the production network. This setup provides the highest level of security and reliability for critical network device management by physically isolating management traffic from production traffic. While a management VLAN provides a level of isolation, it is still part of the same physical network infrastructure. This is considered a form of virtual out-of-band management but does not fully comply with the policy of complete physical isolation.

Answer 70

-to enable voice traffic digitization The T-carrier system was designed to digitize voice traffic for transport around the core of the telecommunications network. It also supports the transportation of other types of digital data and can be provisioned directly to subscribers as a leased line.

Answer 71

-Determining the type of WAN technology and service provider Determining the type of WAN technology and selecting a service provider are the most critical initial steps in setting up a WAN. This decision will influence all subsequent choices, including the physical layer requirements, IP addressing scheme, and security measures.

Answer 72

-Internet-based VPN connectivity

Answer 73

-To eliminate snowflake systems The primary goal of IaC is to eliminate snowflake systems, which are unique configurations that drift from the standard due to manual changes or updates. By using IaC, organizations can ensure consistent and repeatable environments, reducing the risk of security and stability issues.

Answer 74

-Consolidating networking services into a single, cloud-based service The primary benefit of implementing Secure Access Service Edge (SASE) is the consolidation of networking and security services into a unified, cloud-based service model. This approach simplifies the management of network security, improves performance by reducing latency, and enhances security posture by applying consistent security policies across all locations and users. SASE's cloud-native nature allows organizations to scale security and networking services as needed, adapting to the dynamic requirements of modern workforces and cloud applications.

Answer 75

-scp report.txt bob@remote.example.com:/home/bob/

Answer 76

-255.255.255.192

Answer 77

-Single Mode Fiber (SMF) for both internal and external connections The correct answer is to select Single Mode Fiber (SMF) for both internal and external connections. Single Mode Fiber (SMF) is the best choice for both internal and external connections in this scenario due to its ability to transmit data over long distances with minimal loss and high bandwidth. SMF is designed for long-haul communications, making it ideal for the 2-kilometer connection to the external network. It also provides the high bandwidth necessary for the data center's internal network backbone, supporting the high-speed requirements of modern data centers. MultiMode Fiber (MMF) for both internal and external connections is incorrect because MMF is typically used for shorter distances due to its higher attenuation and modal dispersion compared to SMF. While MMF might be suitable for some internal connections, it is not the best choice for the 2-kilometer external connection. While Single Mode Fiber (SMF) for external connections and MultiMode Fiber (MMF) for internal connections might seem like a viable option since SMF is suitable for long distances and MMF could be considered for shorter, internal connections. However, using two different types of fiber within the same network can complicate the infrastructure and increase costs. Since SMF can cover both requirements efficiently, it's more practical to use SMF for all connections.

Answer 78

-Two A spine and leaf topology consists of two layers: the spine layer, which includes top-tier distribution switches forming the backbone, and the leaf layer, which contains access switches that connect devices to the spine switches.

Answer 79

-Layer 2 switch

Answer 80

-Broadcast addressing IPv6 does not use broadcast addressing, which is a method used in IPv4 to send data to all nodes on a network. Instead, IPv6 achieves similar functionality through multicast addressing, which allows for the efficient distribution of data to multiple designated recipients. This change eliminates the inefficiencies associated with broadcasting data to all nodes, including those that do not need it. Unicast addressing is used in both IPv4 and IPv6. It refers to the communication between a single sender and a single receiver across a network. Multicast addressing is used in IPv6 to replace the functionality of broadcast addressing from IPv4. It allows for the efficient transmission of data to multiple specific recipients. Anycast addressing is also used in IPv6 and refers to the delivery of data to the nearest or best destination out of a group of potential receivers that share the same address.

Answer 81

-It encapsulates IP packets for transmission over serial digital lines.

Answer 82

-It requires compatible clients and servers for operation. The Teredo protocol requires compatible clients and servers to tunnel IPv6 packets as IPv4-based UDP messages over port 3544. This compatibility is necessary for the protocol to function correctly across different systems.

Answer 83

-Miredo On Linux, Miredo client software is used to implement Teredo tunneling. Teredo tunneling establishes a tunnel between individual hosts. Hosts must be dual-stack hosts so that they can tunnel IPv6 packets inside of IPv4 packets. Teredo works with NAT. ISATAP and 6to4 tunneling both require at least one router. You only need to tunnel between two individual computers. 4to6 tunneling is used to send IPv4 traffic through an IPv6 network by encapsulating IPv4 packets within IPv6 packets.

Answer 84

-255.255.255.0 A subnet mask of 255.255.255.0 corresponds to a /24 CIDR notation, providing up to 254 usable host addresses per subnet, which is sufficient to support up to 200 devices per floor. 255.255.254.0 (/23) provides up to 510 usable host addresses per subnet, which is more than necessary and would result in fewer total subnets than required. 255.255.252.0 (/22) is the subnet mask for the original network and does not divide it into smaller subnets. 255.255.255.128 (/25) only provides up to 126 usable host addresses per subnet, which is not enough to meet the requirement of supporting up to 200 devices.

Answer 85

-/etc/network/interfaces The /etc/network/interfaces file is a traditional location for defining network interface configurations in Debian-based Linux distributions. This file allows for the persistent configuration of network interfaces, ensuring they are correctly set up at boot time. /etc/sysconfig/network-scripts/ifcfg-eth0 is incorrect because this path is specific to Red Hat-based distributions and not the historically common location across all Linux distributions.

Answer 86

-Virtual Private Network (VPN) VPNs are a classic example of overlay networks because they create a secure logical network over the public Internet (or any other network), effectively hiding the complexity of the underlying network infrastructure.

Answer 87

-Relative Distinguished Name (RDN The most specific attribute in a distinguished name is called the Relative Distinguished Name (RDN). It uniquely identifies the object within the context of its parent attribute values, making it crucial for distinguishing objects in a directory. The Common Name (CN) is an attribute used within a distinguished name but is not specifically referred to as the most specific attribute. A Fully Qualified Domain Name (FQDN) is a complete domain name for a specific computer or host on the Internet, not a term used within the context of distinguished names in directories. A Universal Principal Name (UPN) is a user account name in Active Directory, not the most specific attribute in a distinguished name.

Answer 88

-Hosted Private A hosted private cloud is the most suitable option for the software development company. This model provides an environment that is exclusively used by the company for its project, ensuring the security and performance required by the client. Since the cloud is hosted by a third party, the company does not need to manage the cloud infrastructure directly, aligning with its preference to minimize management efforts. Additionally, compliance with strict industry regulations can be more easily achieved in a dedicated environment.

Answer 89

-A NIC with fiber optic ports and support for 10 Gbps Ethernet

Answer 90

-Direct connect or private link through colocation

Answer 91

-Modulation -Encoding The following are the steps involved in transmitting a signal using electromagnetic radiation: Modulation. Modulation is the process of varying a carrier wave to transmit a signal, and encoding is the method of converting information into a form that can be transmitted over the wave, such as changing voltage levels to represent digital data. These steps are essential for transmitting a signal using electromagnetic radiation. Encoding. Encoding involves converting information into a form that can be transmitted, and modulation is the process of varying a carrier wave based on this information to transmit the signal. These are the two key steps in transmitting a signal using electromagnetic radiation, essentially detailing how data is prepared and then sent over electromagnetic waves.

Answer 92

-RJ-11 port For a Digital Subscriber Line (DSL) internet service, the appropriate port to use on a SOHO router is the RJ-11 port. This port is designed for telephone line connections, which are used by DSL services to provide internet connectivity. The RJ-11 port allows the router to connect directly to the ISP's network via a telephone line.

Answer 93

-The switch port is automatically negotiating to full-duplex while the legacy device is operating in half-duplex; the administrator should manually set the port to half-duplex to the correct speed

Answer 94

-It can inspect only port numbers and not any other Layer 4 header information.

Answer 95

-Create a security list for the subnet that allows inbound traffic on port 22 from the subnet's CIDR range and denies all other inbound traffic.

Answer 96

-Edit the /etc/network/interfaces file to include the interface configuration.

Answer 97

-Implement a software-based VoIP PBX solution.

Answer 98

-Functions -Appliances

Answer 99

-MAPI In a Windows environment, the proprietary Messaging Application Programming Interface (MAPI) protocol is typically used to access Microsoft Exchange mailboxes. MAPI allows for integration with Microsoft products and provides functionalities specific to Exchange. IMAP is a general email access protocol and not specific to Microsoft Exchange. SMTP is used for sending emails, not for accessing mailboxes. HTTPS is a secure transport protocol used on the web, not specifically for accessing Microsoft Exchange mailboxes.

Answer 100

-Collision domains are about physically shared media, and their borders are established by bridges and switches.

Answer 101

-Easier updates

Answer 102

-Information about the connection QoS provides information about the connection to a QoS system, which in turn ensures that voice or video communications are free from problems, such as dropped packets, delay, or jitter.

Answer 103

-Mesh network topology using devices that support the 802.11s standard.

Answer 104

-implement a topology table to prevent routing loops and support rapid convergence.

Answer 105

-Lightweight AP

Answer 106

-UltraPhysical Contact (UPC) finishing

Answer 107

-Translation table

Answer 108

-Instructors being unable to access the server because it is on a private network

Answer 109

-interface G0.30

Answer 110

-To protect the cables from physical damage and environmental factors

Answer 111

-Decrease the priority value of the switch connected to the high-bandwidth backbone.

Answer 112

-Dynamic NAT

Answer 113

-NTS (network time security)

Answer 114

-Rack diagram

Answer 115

-The maximum acceptable amount of data loss measured in time

Answer 116

-Mandatory Access Control (MAC)

Answer 117

-Perform a posture assessment to evaluate the maturity level of the security controls.

Answer 118

-The port security is configured with a maximum of two MAC addresses.

Answer 119

-Knowledge-based authentication

Answer 120

-Scan the network for rogue DHCP servers. -Inspect DNS traffic for anomalies

Answer 121

-Replace the default certificate.

Answer 122

-A multicast address

Answer 123

-Authorized usage of a resource

Answer 124

-RADIUS, because it is widely used for client device access over VPNs and supports UDP for efficient communication.

Answer 125

-The attacker attaches a device that spoofs the operation of a switch to the network and negotiates the creation of a trunk port.

Answer 126

-Fileless malware

Answer 127

-14 characters for critical infrastructure like network appliances, the document recommends passwords to be 14 characters or longer to resist guessing and cracking attacks effectively. 8 characters is the minimum for general passwords, not for network appliances. 10 characters falls short of the recommendation for critical infrastructure. 12 characters is closer but still below the recommended length

Answer 128

-To start a session over the network

Answer 129

-route print

Answer 130

-It is sent as a broadcast to all devices on the network.

Answer 131

-It represents a halving or doubling of the distance.

Answer 132

-Scans 1,000 commonly used ports

Answer 133

-dig @ns1.isp.example example.com A MX

Answer 134

-Fully Shielded Twisted Pair (S/FTP)

Answer 135

-Decrease the transmit power of the APs.

Answer 136

-tracert -w The tracert -w command option allows the user to specify the timeout value in milliseconds for each hop. By using this option, the IT consultant can adjust how long the tracert command waits for a response from each hop, which is particularly useful in a high latency environment to ensure that the command does not prematurely time out before receiving responses. The tracert -d command is incorrect because the -d option disables DNS resolution, which does not affect the timeout value for responses from each hop. This option would not help the IT consultant in ensuring that the tracert command accurately reflects the network conditions in a high latency environment. The tracert -I command is incorrect because this option is not valid for the tracert command on Windows systems. The -I option is associated with the traceroute command on other systems for specifying ICMP Echo Request probes, and it does not relate to adjusting the timeout value. The tracert -h command is incorrect because the -h option specifies the maximum number of hops that tracert will probe before stopping. While it limits the scope of the tracert command, it does not affect the timeout value for waiting for responses from each hop.

Answer 137

-The routing table on the router for any incorrect or missing routes.

Answer 138

-ifconfig -a

Answer 139

-The host misroutes its replies, thinking communicating hosts are on a different subnet.

Answer 140

-To account for suboptimal installation conditions and potential future repairs

Answer 141

-ip neigh add 192.168.1.100 lladdr 00:1A:2B:3C:4D:5E nud permanent dev eth0

Answer 142

-The port is blocked by the spanning tree algorithm to prevent network loops. A solid amber LED on a switch port signifies that the port is blocked by the spanning tree algorithm, which is a network protocol that ensures a loop-free topology for any bridged Ethernet local area network. A flickering green LED, not a solid amber one, indicates that the link is operating normally with traffic. A blinking amber LED, not a solid amber one, indicates a fault such as a duplex mismatch. A solid green LED, not a solid amber one, indicates that the link is connected but there is no traffic passing through.

Answer 143

-traceroute -I

Answer 144

-The network is not implementing any roaming standards such as 802.11r, 802.11k, or 802.11v The correct answer is that the network is not implementing any roaming standards such as 802.11r, 802.11k, or 802.11v. Even if the APs are functioning correctly and are not overloaded, the absence of roaming standards like 802.11r (Fast BSS Transition), 802.11k (Radio Resource Measurement), and 802.11v (Wireless Network Management) can lead to intermittent connectivity issues as students move between lecture halls. These standards are designed to improve roaming experiences by facilitating better client transitions between APs and providing clients with information about the network topology.

Answer 145

-show running-config interface -show interface

Answer 146

-Wireless clients staying connected to the same network as they move around

Answer 147

-Terminal Access Controller Access Control System (TACACS+) Terminal Access Controller Access Control System Plus (TACACS+) authenticates administrative access to routers and switches. TACACS+ uses TCP over port 49 and the reliable delivery offered by TCP makes it easier to detect when a server is down, and encrypts all the payload in packets. RADIUS (Remote Authentication Dial-in User Service) is often used in VPN implementations, and manages remote and wireless authentication infrastructures.

Answer 148

-Something you do

Answer 149

-Access control vestibule

Answer 150

-Resource exhaustion -Virtual local area network (VLAN) hopping -Deauthenticaion

Answer 151

-address Resolution Protocol (ARP) cache poisoning ARP poisoning perpetuates a MitM attack by broadcasting unsolicited gratuitous ARP reply packets with a spoofed source address. Because ARP has no security, the receiving devices trust this communication.

Answer 152

-Amplification attack -Distributed Reflection Denial of Service (DRDoS) -Distributed Denial of Service (DDoS) An amplification attack is where the attacker implements an amplification factor, and dramatically increases the bandwidth sent to a victim during a DDoS attack.

Answer 153

-Wired Equivalent Privacy (WEP)

Answer 154

-Tailgating is done without permission, while piggybacking is with.

Answer 155

-The single firewall configuration uses a triple homed setup The main difference between a screened subnet using multiple firewalls and one using a single firewall is that the single firewall configuration typically employs a triple homed setup. This means that one firewall appliance has three network interfaces: one for the public network, one for the perimeter network, and one for the LAN, allowing for controlled access between these zones.

Answer 156

-EAPoL Under 802.1X, the device requesting access is the supplicant. The switch, referred to as the authenticator, enables the Extensible Authentication Protocol over LAN (EAPoL) protocol only and waits for the device to supply authentication data. One solution to the risk of rogue access points is to use EAP-TLS security so that the authentication server and clients perform mutual authentication. 802.1X defines the use of EAP over Wireless (EAPoW) to allow an access point to forward authentication data without allowing any other type of network access. The IEEE 802.1X Port-based Network Access Control (NAC) protocol provides the means of using an EAP method when a device connects to an Ethernet switch port, wireless access point, or VPN gateway.

Answer 157

-The product is no longer being sold

Answer 158

-An IPAM service IPAM or Internet Protocol (IP) address management is designed to scan Dynamic Host Configuration Protocol (DHCP) and Domain Name System (DNS) servers and log IP address usage to a database. It can be used to manage and reconfigure DHCP and DNS servers remotely.

Answer 159

-Logical A logical network diagram illustrates the network architecture of a company's network equipment without necessarily involving a specific floor plan or layout. A physical network diagram illustrates the network architecture of a company's network equipment in such forms as a floor plan or wire diagram. A baseline is a snapshot of a known good configuration and how a device operates at that known good configuration. A site survey is a critical planning tool to ensure that the Wireless Local Area Network (WLAN) delivers acceptable data rates to the supported number of devices in all the physical locations expected.

Answer 160

-Memorandum of understanding

Answer 161

-Floor A floor plan is a detailed diagram of wiring and port locations. For example, the IT department might use floor plans to document wall port locations and cable runs in an office. A wiring diagram (or pin-out) shows detailed information about the termination of twisted pairs in an RJ-45 or RJ-48C jack or Insulation Displacement Connector (IDC). A rack diagram records the position of each appliance in the rack. A site survey is a critical planning tool to ensure that the Wireless Local Area Network (WLAN) delivers acceptable data rates to the supported number of devices in all the physical locations expected.

Answer 162

-Regularly generate and review reports that highlight any changes made to the production configuration of network devices compared to the baseline configuration. -Use tools capable of identifying line-by-line differences between the production and baseline configurations of network devices.

Answer 163

-A 200 status code A 200 status code indicates that an HTTP request has succeeded, which is what an availability monitor looks for to confirm that a service is available. A 404 status code indicates that the requested resource could not be found, which would suggest unavailability. A 500 status code indicates an internal server error, also suggesting a problem with availability. A 302 status code indicates a temporary redirection, not necessarily that the service is available.

Answer 164

-Enable and configure only SNMPv3. -Configure a private VLAN. Simple Network Management Protocol (SNMP) version 3 supports encryption of data logs as they travel over the network to a target system like an analytics server. A private VLAN (PVLAN) applies an additional layer of segmentation by restricting the ability of hosts within a VLAN to communicate directly with one another. PVLAN adds an extra layer of security over the network. The Router Advertisement Guard (RA Guard) Switchport security feature blocks router advertisement packets from unauthorized sources. Dynamic ARP inspection (DAI) prevents a host attached to an untrusted port from flooding the segment with gratuitous ARP replies. ARP inspection maintains a trusted database of IP:ARP mappings.

Answer 165

-Audit An audit log records the use of authentication and authorization privileges. It will generally record success/fail type of events. An audit log is also known as an access log or security log. A baseline is a snapshot of a known good configuration and how a device operates at that known good configuration. A Simple Network Management Protocol (SNMP) Trap is an agent that informs the SNMP monitor of a notable event (port failure, for instance). The sysadmin can set the threshold for triggering traps for each value. Performance and traffic logs record statistics for compute, storage, and network resources over a defined period. This log would help to determine performance issues on a given network.

Answer 166

-Reverse lookup zone PTR=Pointer record Forward Lookup Zone: Resolves domain names → IP addresses. This is where you configure A (Address) or AAAA records. PTRs are not configured here. Reverse Lookup Zone: Resolves IP addresses → domain names, which is exactly what a PTR record does. So PTR records live here. DNS Forwarder: Used to forward queries to another DNS server; it doesn’t store PTR records. DNS Hierarchy: Refers to the overall structure of DNS zones/domains; it’s not where you configure individual PTR records.

Answer 167

-SRV (service record) A Service (SRV) record is a DNS record used to identify a record that is providing a network service or protocol. Properties of this record type include port and protocol.

Answer 168

-Scope options

Answer 169

-Configure the correct NTP settings.

Answer 170

-Internal DNS zone Internal domain name system (DNS) zones refer to the domains used on a private network. As the site uses the same domain name as AD, an A record for www needs to be created internally to point to the public web server address.

Answer 171

T2 T1 A client can renew its lease from a Dynamic Host Configuration Protocol (DHCP) server when at least half the lease's period has elapsed (T1 timer) so that it keeps the same IP addressing information. A client can attempt to rebind the same lease configuration with any available DHCP server. By default, this happens after 87.5% of the lease duration is up (T2 timer). The DHCP lease process is often known as the DORA process. This process of obtaining a lease includes Discover, Offer, Request, and Ack(nowledge). When negotiating an address from a DHCP server, an ARP message checks that the address is unused.

Answer 172

-Tunnel mode Tunnel mode is used for communication between VPN gateways across an unsecure network. With ESP, the whole IP pack is encrypted and encapsulated as a diagram with a new IP header. AH has no real use in tunnel mode. Transport mode is used to secure communications between the host on a private network. When ESP is applied in transport mode, only the payload data is encrypted. If AH is used in transport mode, it can provide integrity for the IP header. Full tunnel allows internet across that is mediated by the corporate network that will alter the client IP address and DNS servers and may use a proxy. Transport layer security (TLS) can be used to encapsulate frames or IP packets.

Answer 173

-Mediates internet access through the corporate network

Answer 174

A console, or rollover cable, is traditionally colored pale blue and connects a computer or laptop to the command line terminal of a switch or router. A crossover cable has a T568A terminator at one end and a T568B terminator at the other. This type of cable connects an end system (host) to another host or a hub to a hub. A straight through cable has either T568A terminators at both ends or T568B terminators at both ends. This type of cable is an uplink (MDI port to MDIX port). Unshielded twisted pair cable is a media type that uses copper conductors arranged in pairs that come twisted to reduce interference. Typically, cables are 4-pair or 2-pair.

Answer 175

-Clientless VPN Clientless VPN requires a client appl that implements the protocols and authentication methods by the remote desktop/VPN gateway. Virtual Network Computing (VNC) allows a site to operate a remote desktop gateway that facilitates access to virtual desktops or individual apps running on the network servers. Split tunnel allows the client to access the internet directly using its native IP configuration and DNS servers. Full tunnel allows internet access that is mediated by the corporate network that will alter the client's IP address and DNS servers and may use a proxy. Previous

Answer 176

-Tunnel mode Tunnel mode is used for communication between VPN gateways across an unsecure network. With ESP, the whole IP packet is encrypted and encapsulated as a datagram with a new IP header. AH has no real use in tunnel mode.

Answer 177

-Data segmentation and reassembly -Reliable message delivery -End-to-end flow control

Answer 178

Load balancer

Answer 179

TTL The TTL output field in the ping command shows the value of the counter when the packet arrives at its destination.

Answer 180

Access point A wireless router is also known as an access point (AP). These types of omnidirectional devices are commonly mounted on the ceiling for maximum range. Digital subscriber line (DSL) is a technology for transferring data over voice-grade telephone lines. A DSL modem is commonly used to connect customers to an Internet service provider (ISP).

Answer 181

Infrastructure

Answer 182

A virtual private network

Answer 183

NFV Virtual appliances might be developed against a standard architecture, such as ETSI's Network Function Virtualization (NFV). NFV divides provisioning into three domains. Typically, a hypervisor will implement network connectivity by means of one or more virtual switches (or vSwitch in VMware's terminology). These perform the same function as Layer 2 physical switches. In a virtualization host, the hypervisor manages the virtual environment (such as virtual NICs) and facilitates interaction with the computer hardware and network. Multiprotocol Label Switching (MPLS) is a means of establishing private links with guaranteed service levels. MPLS can operate as an overlay network to configure point-to-point or point-to-multipoint links.

Answer 184

Shared costs

Answer 185

GRE Generic Routing Encapsulation (GRE) Tunneling protocol allows the transmission of encapsulated frames or packets from different types of network protocol over an IPv4 network. The Internet Control Message Protocol (ICMP) reports errors and sends messages about the delivery of a packet.

Answer 186

MPLS mGRE Multipoint Generic Routing Encapsulation (mGRE) is a version of the Generic Routing Encapsulation (GRE) protocol that supports point-to-multipoint links, such as the hub and spoke dynamic multipoint Virtual Private Network (VPN). Multiprotocol label switching (MPLS) can operate as an overlay network to configure point-to-point or point-to-multipoint links between nodes regardless of the underlying physical and data link topologies.

Answer 187

Internet protocol security (IPSec) Internet protocol security (IPSec) can be used to secure IPv4 and/or IPv6 communications on local networks and as a remote access protocol. Each host that is required to use IPSec must be assigned a policy.

Answer 188

sip:sam.smith@abccompany.com sip:sam.smith@1234567890

Answer 189

TCP 67 Information can be viewed from Dynamic Host Configuration Protocol (DHCP) traffic by filtering on TCP 67 and 68. DHCP dynamically assigns IP addresses to network hosts. Server Message Block (SMB) provides File/Print Sharing Service and operates on TCP 139 and 445. SMB allows a machine to share its files and printers to make them available Hypertext Transfer Protocol (HTTP) operates over TCP 80 and enables clients to request resources from a HTTP server. The Network Time Protocol (NTP) enables the synchronization of time-dependent applications. A server or host that is configured with the incorrect time may not be able to access network services. Authentication, and other security mechanisms will often fail if the time is not synchronized on both communicating devices. Errors are likely to be generic failed or invalid token messages.

Answer 190

remote Desktop Protocol (RDP) is Microsoft's protocol for operating remote Graphical User Interface (GUI) connections to a Windows machine. RDP uses Network Level Authentication (NLA) which requires the client to authenticate before a full remote session is started.

Answer 191

Anycast The correct answer is anycast. Anycast addressing allows multiple servers to share the same IP address, and when a user attempts to connect, the network routes the user to the nearest server based on routing protocols. This is ideal for achieving high availability and low latency by directing users to the geographically closest server, ensuring faster response times and reliable service delivery.

Answer 192

Cable stripper

Answer 193

Fibre Channel The Fibre Channel connects storage area networks using 3 main types of components: the initiator, the target, and the Fibre Channel switch. The initiator is the client device of the SAN. The target is the network port for a storage device. The Fibre Channel switch, sometimes referred to as a director, provides the connections between the initiator and the target.

Answer 194

Twinaxial Twinax is for data center 10 GbE (unofficially referred to as 10GBASE-CR) and 40 GbE (40GBASE-CR4) interconnections of up to about 5 meters for passive cable types and 10 meters for active cable types. Coaxial/RG-6 is an 18 AWG cable with 75-ohm impedance typically used as drop cable for Cable Access TV (CATV) and broadband cable modems. A 10GBASE-LR is rated for 10 km operation over single mode fiber. A 10BASE-T denotes an early implementation that works at 10 Mbps (10), uses a baseband signal (BASE), and runs over twisted pair copper cabling (-T).

Answer 195

1000BASE-LX The 1000BASE-LX is a Gigabit Ethernet standard and supports 1 Gbps and a distance of 5 km using single mode fiber. Installers often use the 100BASE-FX Fast Ethernet firer standard for wiring backbones. It uses multimode fiber for speeds of up to 100Mbps for a distance of up to 2 km. The 100BASE-SX is a Fast Ethernet fiber standard that supports lengths up to 300 meters and speeds up to 100Mbps. The 10GBASE-SR is a 10 Gigabit Ethernet fiber standard in backbone configurations, and it supports up to 300-meter link lengths.

Answer 196

Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol uses schemes, such as "request to send," to gain access to the media. Nodes listen to the media before transmitting and transmit when the media is clear. A node wanting to transmit but detecting activity, must wait and try later. CSMA with Collision Detection (CSMA/CD) protocol defines methods for detecting a collision. When a signal present on the interface transmits and receives lines simultaneously, the node broadcasts a jam signal. Virtual Local Area Network (VLAN) creates separate layer 2 broadcast domains on the same switch or configures separate broadcast domains across distributed switches. Nodes that share the same broadcast address are within the same broadcast domain.

Answer 197

Enhanced quad small form-factor pluggable (QSFP+) Enhanced quad small form-factor pluggable (QSFP+) supports 40 GbE by provisioning 4 x 10 Gbps links. Enhanced form-factor pluggable (SFP+) is an updated specification to support 10 GbE but still uses the LC form factor. Dense Wavelength Division Multiplexing (DWDM) provisions greater numbers of channels (20, 40, 80, or 160). This means that there is much less spacing between each channel and requires more precise and expensive lasers. Coarse Wavelength Division Multiplexing (CWDM) supports up to 16 wavelengths and is typically used to deploy four or eight bidirectional channels over a single fiber strand.

Answer 198

Point-to-point protocol (PPP) Point-to-point protocol (PPP) is an encapsulation protocol that works at the Data Link layer (layer 2). PPP has no security mechanisms, so must be used with other protocols to provision a secure tunnel.

Answer 199

Point-to-point protocol (PPP) Point-to-point protocol (PPP) is an encapsulation protocol that works at the Data Link layer (layer 2). PPP has no security mechanisms, so must be used with other protocols to provision a secure tunnel. Generic Routing Encapsulation (GRE) works at layer 3. GRE packet can encapsulate an IP packet as its payload. GRE does not have any mechanisms for authenticating users or devices and so is often used with other protocols in a VPN solution. Internet protocol security (IPSec) operates at the network layer 3 of the OSI model to encrypt packets passing over any network. Transport layer security (TLS) can be used to encapsulate frames or IP packets.

Answer 200

Classless Inter-Domain Routing (CIDR) The company is using Classless Inter-Domain Routing (CIDR). CIDR uses bits normally assigned to the network ID to mask the complexity of the subnet and host addressing scheme within the network. CIDR allows the company to collapse the three routing entries into one single entry. Variable Length Subnet Masking (VLSM) allows a network designer to allocate ranges of Internet Protocol (IP) addresses to subnets that match the predicted need for numbers of subnets and hosts per subnet.

Answer 201

Duplicate MAC address A duplicate Media Access Control (MAC) address causes both hosts to contend with each other when responding to Address Resolution Protocol (ARP) queries. Then, communications could be split between them or reach only one of the hosts. If Windows detects a duplicate internet protocol (IP) address, it displays a warning and disables IP traffic. In this case, network traffic is still occurring.

Answer 202

Class A network Private IP addressing

Answer 203

It is associated with the numeric loopback address for internal testing. "localhost" is a hostname that refers to the current device being used. It is associated with the loopback address, typically 127.0.0.1, which is used for internal testing and communication within the host. This allows software and services on the same device to communicate with each other using the TCP/IP protocol stack without sending packets over the network.

Answer 204

VXLAN VXLAN (Virtual Extensible LAN) is commonly used in data centers to implement overlay networks. It allows for the creation of a logical network on top of a physical network using layer 2 encapsulation over a layer 3 IP network.

Answer 205

To transfer IPv4 traffic over an IPv6 network The correct answer is to transfer IPv4 traffic over an IPv6 network. NAT64 encapsulates an IPv4 address inside an IPv6 address. For the internet, it looks like IPv6, but when it hits an end network, it is stripped down to IPv4 and routed the rest of the way. Encapsulating IPv6 packets within IPv4 packets describes tunneling mechanisms, not NAT64. Running both IPv4 and IPv6 simultaneously on hosts and routers describes the dual stack approach, not NAT64. Replacing the 2002::/16 prefix with an ISP-managed prefix describes the IPv6 Rapid Deployment (6RD) protocol, not NAT64.

Answer 206

0272:8bff:fe31:8bcb Globally scoped unicast addresses are routable over the Internet and are the equivalent of public Internet Protocol version 4 (IPv4) addresses. A MAC address is 48 bits and an Extended Unique Identifier (EUI)-64 creates a 64-bit interface. The digits fffe are added in the middle of the address and the Universally Administered (U)/Locally Administered (L) bit is flipped. The proper EUI-64 in this scenario is 0272:8bff:fe31:8bcb.

Answer 207

SD-WAN and SSE SASE combines Software-Defined Wide Area Network (SD-WAN) and Security Service Edge (SSE) technologies to create a secure, efficient way to connect users to services regardless of location.

Answer 208

In a corporate data center In a public cloud

Answer 209

Enclosed within brackets [ ]

Answer 210

Distance vector Routing Information Protocol (RIP) – This is a distance-vector routing protocol that calculates the best path based on the number of hops between source and destination. The maximum number of hops allowed is 15, making it unsuitable for very large networks. Distance vector – This is a general class of routing protocols, which includes RIP, where routers share their entire routing table with neighbors periodically. RIP is a specific distance-vector protocol.

Answer 211

IGP Enhanced Interior Gateway Routing Protocol (EIGRP) is an advanced distance vector or hybrid routing protocol. EIGRP relies on neighboring routers to report paths to remote networks.

Answer 212

Each router must have a unique MAC and IP address, but they share a common virtual IP address. FHRP (First Hop Redundancy Protocols) like HSRP, VRRP, and GLBP are used to provide high availability for the default gateway in a network. Each physical router has its own unique IP and MAC for its interface. The routers share a virtual IP address (the default gateway for hosts) so that if one router fails, another can take over without changing the gateway on hosts. Some protocols (like HSRP) also use a virtual MAC address for the shared IP, but the physical interfaces themselves keep their unique MACs.

Answer 213

Switches are organized into a hierarchy. Each switch determines the shortest path to the root.

Answer 214

The tag is stripped, and the frame is forwarded to the host

Answer 215

Top-of-rack switching Top-of-rack switching refers to the practice of using switches specifically made to provide high-bandwidth links between distribution switches and server nodes.

Answer 216

Speed Switches support a range of Ethernet standards so older and newer network adapters can all connect to the same network. In most cases, a sysadmin sets a port on the switch to autonegotiate speed (10/100/1000 Mbps.) When a switch needs to connect to another switch, communications would fail if both interfaces used MDI-X. Nowadays, most switch interfaces configure to use auto-MDI/MDIX by default.

Answer 217

LACP Link Aggregation Control Protocol (LACP), which can be used to auto-negotiate the bonded link between the switch ports and the end system, detects configuration errors and recovers from the failure of one of the physical links. When Ethernet is wired with a hub, there must be a means of distinguishing the interface on an end system versus an intermediate system. The interface on the hub is called an MDI crossover (MDI-X).

Answer 218

Auxiliary VLAN Multiple broadcast domains

Answer 219

Jumbo frames

Answer 220

Absorption Absorption refers to the degree to which walls and windows will reduce signal strength (some of the radio wave's energy is lost as heat when passing through construction materials). Glass or water can cause radio waves to bend and take a different path to a receiver and cause the data rate to drop. This is known as refraction. Mirrors or shiny surfaces cause signals to reflect, meaning that a variable delay is introduced. Refection causes packets to be lost and consequently the data rate to drop. Attenuation is the loss of signal strength that occurs as the signal travels through the media. Some media is more prone to attenuation than others.

Answer 221

Effective isotropic radiated power (EIRP) The power at which an access point transmits is configurable. Effective Isotropic Radiated Power (EIRP) is calculated as the sum of transmit power, antenna cable/connector loss, and antenna gain. The Received Signal Strength Indicator (RSSI) is the strength of the signal from the transmitter at the client end.

Answer 222

Wi-Fi 5 Wi-Fi 5 (802.11ac) is designed to provide network throughput similar to Gigabit Ethernet. An AC5300 can support 1000 Mbps over a 40 MHz 2.4 GHz band channel and two 2,167 Mbps streams over 80 MHz 5 GHz band channels. Wi-Fi 4 (802.11n) is rated at providing 72 Mbps per stream. Assuming the maximum number of four spatial streams and optimum conditions, the nominal data rate could be as high as 600 Mbps for a 40 MHz bonded channel.

Answer 223

Yagi antenna A Yagi (a bar with fins) antenna is a valuable unidirectional signal for point-to-point wireless bridge connections. This is common for outdoor use and can boost radio signals across long distances. A static dish antenna is a parabolic or dome shaped antenna that is unidirectional. This antenna is expensive with up-front cost and maintenance. A torus (donut) antenna is similar to round wireless routers that businesses mount in an office ceiling. This is not ideal for outdoor use. A parabolic grid antenna looks like a dome but with a more rectangular feature with grid-like openings. This antenna is expensive with up-front cost and maintenance.

Answer 224

WPA2-Personal Wi-Fi Protected Access version 2 (WPA2)-Personal uses a pre-shared key (PSK) that all users will use to connect to the access point (AP). WPA2, in general, uses Wi-Fi encryption with Advanced Encryption Standard (AES) and Cipher Block Chaining Message Authentication Code Protocol (CCMP). WPA2-Enterprise does not use a PSK to connect clients to an access point (AP). Enterprise mode allows users to use their account credentials to connect.

Answer 225

Captive portal Most captive portal issues arise because the redirect does not work. The captive portal should use HTTPS. Most modern browsers will block redirection to sites that do not use TLS.

Answer 226

It uses an independent basic service set (IBSS) An independent basic service set (IBSS) is an ad hoc topology where the wireless adapter allows connections to and from other wireless devices. Clients can roam within an extended service area (ESA). ESA uses multiple access points (APs) with the same service set identification (SSID) and security configuration connected by a wired network. An extended service set (ESS) uses more than one basic service set to create. A basic service set (BSS) is an AP that mediates communications between client devices and provides a bridge to a cabled network segment.

Answer 227

To protect individual elements within a rack

Answer 228

Patch panel

Answer 229

To allow for a higher load capacity with lower amperage High voltage circuits are used in data centers and equipment rooms because they allow for a higher load capacity while requiring lower amperage. This is beneficial because it reduces the risk of overloading circuits and allows for more efficient power distribution across the facility.

Answer 230

Shielded cabling Cat 3 cable or better PoE requires Cat 3 cable or better while PoE+ must use Cat 5e cable or better. Drawing power down the cable generates more heat that can adversely affect data rates. PoE should use shielded cabling as it is capable of dispersing heat more efficiently than unshielded cabling.

Answer 231

Bottom-to-top A bottom-to-top approach of the OSI (Open System Interconnection) model is a methodical validation of network components starting from the bottom or layer 1 (Physical) and going up. This is most appropriate because cables have just been connected. A top-to-bottom approach of the OSI model is a methodical validation of network components starting from the top or layer 7 (Application) and going down. Systems are at default, so basic network connectivity should be available. Divide and conquer approach starts with the layer most likely to be causing the problem, then work either down or up depending on the test results. A plan of action occurs after a theory has been tested and a cause of the issue is determined.

Answer 232

Attenuation Excessive untwisting at the cable ends

Answer 233

Runts A runt is a frame that is smaller than the minimum size (64 bytes for Ethernet). A collision usually causes a runt frame. A giant is a frame that is larger than the maximum permissible size (1518 bytes for Ethernet II). If it is too large, it may get dropped by networking equipment.

Answer 234

Cat 7 Cat 7 cable is fully screened and shielded (S/FTP) and rated for 10GbE applications up to 100 m (328 feet). The cable supports transmission frequencies up to 600 MHz at 10 Gbps. Cat 5e is tested at 100 MHz (like Cat 5 was) but to higher overall specifications for attenuation and crosstalk, meaning that the cable is rated to handle Gigabit Ethernet (1 Gbps) throughput. Cat 6 can support 10 Gbps speeds only over shorter distances--nominally 55 meters, but often less if cables are closely bundled together.

Answer 235

Incorrect host-based firewall settings A host-based firewall is implemented as a software application running on a host. Often rules need to be manually added to a firewall allow for applications to communicate properly. Authentication, and other security mechanisms will often fail if the time is not synchronized on all communicating devices. An unresponsive service on a system can be caused by many factors. These services may include important network functions such as Dynamic Host Configuration Protocol (DHCP).

Answer 236

Broadcast storm A broadcast storm will cause network utilization to go to a near-maximum capacity and the CPU utilization of the switches to jump to 80 percent or more, making the switched segment effectively unusable until the broadcast storm stops. If a switch is not multicast-aware, it will treat multicast transmissions as broadcasts and flood them across all ports in the broadcast domain, consuming much bandwidth and slow down the network.

Answer 237

An IP address from another subnet is being used.

Answer 238

The subnet mask is too restrictive

Answer 239

Encapsulation errors Encapsulation is the frame format expected on the interface. Encapsulation errors will prevent transmission and reception. If the system administrator checks the interface status, the physical link will list it as up, but the line protocol will list it as down.

Answer 240

Device-related issues Continual bottlenecks in a network are most likely due to device-related issues. This can include hardware that is underpowered, outdated, or malfunctioning, which cannot handle the regular data flow efficiently. Such devices become persistent choke points, reducing the overall network performance regardless of the specific type or volume of traffic.

Answer 241

Downtime/Uptime

Answer 242

OSA An administrator would use an optical spectrum analyzer (OSA) with fiber optic cabling, usually with wavelength division multiplexing (WDM), to ensure that each channel has sufficient power. An optical time domain reflectometer (OTDR) locates breaks in fiber by sending light pulses down the cable and timing how long it takes for any reflections to bounce back.

Answer 243

iptables The iptables command line utility is used to edit the rules enforced by the Linux kernel firewall. It can change INPUT, OUTPUT and FORWARD chains that are firewall rulesets.

Answer 244

show ip cache flow

Answer 245

arp -a 192.150.060.024 It is possible that two systems on the network have the same Internet Protocol (IP) address and the Address Resolution Protocol (ARP) table has the other system stored in the cache. This can be verified by using the command arp -a 192.150.060.024 and reviewing the returned Media Access Control (MAC) address. The command arp -s 192.150.060.024 will not assist the network manager. The -s option allows administrators to add an entry to the ARP cache. The administrator would add the MAC behind the IP. The -d option will delete the entry for the IP address. This will not assist with troubleshooting. The command arp 192.150.060.024 will not return a result as it is not a valid command.

Answer 246

Cable certifier A cable certifier is used to verify that a cable meets its specifications, such as the bandwidth and frequency. For example, it can verify a CAT 5e cable meets specifications and supports speeds of 1000 Mbps, and can verify a CAT 6 cable supports speeds of 10 Gbps. A punch down tool is used to assist in inserting wires into patch panels or punch down blocks. A loopback plug is a connector used for diagnosing transmission problems on parallel and serial ports. It plugs into a port on the back of the computer. A toner probe is used to trace wires or cables by sending a signal from one end of a wire along its entire length.

Answer 247

NAS (Network-Attached Storage)

Answer 248

SAN (Storage Area Network)

Answer 249

wireless controller

Answer 250

content delivery network (CDN)

Answer 251

Layer 1 Physical

Answer 252

Layer 2 Data Link

Answer 253

Layer 3 Network

Answer 254

Layer 4 Transport

Answer 255

Layer 5 Session

Answer 256

Layer 6 Presentation

Answer 257

Layer 6 Application

Answer 258

Network Functions Virtualization

Answer 259

Virtual Private Cloud

Answer 260

Network security group NSG: Like a door with a smart security guard at each house — if you let someone in, their return exit is automatically allowed. NSL: Like a fence around a neighborhood — every incoming and outgoing movement must be checked individually.

Answer 261

Network security lists NSG: Like a door with a smart security guard at each house — if you let someone in, their return exit is automatically allowed. NSL: Like a fence around a neighborhood — every incoming and outgoing movement must be checked individually.

Answer 262

internet gateway

Answer 263

Multiprotocol label switching (MPLS)

Answer 264

SFTP (SSH File Transfer Protocol)

Answer 265

port 1433 (Microsoft SQL Server) or 3306 (MySQL). SQL

Answer 266

Internet Control Message Protocol (ICMP)

Answer 267

Generic Routing Encapsulation (GRE)

Answer 268

Internet Protocol Security (IPsec)

Answer 269

Authentication header (AH)

Answer 270

Encapsulating security payload (ESP)

Answer 271

Internet Key Exchange (IKE)

Answer 272

Flooding Regarding flooding, there may be natural or person-made flood risks from nearby watercourses and reservoirs or leaking plumbing or fire suppression systems. High temperatures will make it difficult for device and rack cooling systems to dissipate heat effectively.

Answer 273

Locking cabinets Locking cabinets can provide secure storage for individual items, such as cryptographic keys or shared password lists. Locking racks can have whole pieces of equipment installed within them to protect against insider attacks and attacks that breakthrough perimeter security mechanisms. Smart lockers are incorrect because their cryptographic keys need to be stored under lock and key. Smart lockers unlock via a smart card/badge or biometric. Access control vestibule (previously known as a mantrap) is used to prevent unauthorized access to facilities by using a gateway that leads to an enclosed space protected by another barrier.

Answer 274

The IIS service is not running. TCP ports are blocked.

Answer 275

Encryption protocol mismatch An encryption protocol mismatch will cause the connection to fail, even if the correct credentials are supplied. Check OS drivers or verify authentication types/protocols on the device. A captive portal is a web page or website to which a client is redirected before being granted full network access. This would not apply in this situation.

Answer 276

Anycast Anycast means that a group of hosts is configured with the same IP address. It allows for load balancing and failover between the server hosts sharing the IP address.

Answer 277

Tagged port A tagged port, often operating as a trunk port, is used for transporting traffic addressed to multiple VLANs. This configuration is typically used to connect switches or to connect a switch to a router in environments where multiple VLANs exist. An untagged port is used for single VLAN traffic, not multiple VLANs. An access port is another term for an untagged port, which is not used for handling multiple VLANs. A host port is also another term for an untagged port, which is not suitable for connecting switches or routers for multiple VLANs.

Answer 278

Multimode Multimode fiber is inexpensive to deploy compared to single-mode fiber. As such, it does not support long distances as single-mode and is more suitable for Local Area Networks (LANs) than Wide Area Networks (WANs). Single-mode cables support data rates up to 10 Gbps or better and cable runs of many kilometers, depending on the quality of the cable and optics.

Answer 279

It handles untagged traffic on a trunk port. The native VLAN is designated to manage untagged traffic that arrives on trunk ports, ensuring that this traffic is correctly processed and forwarded. This is crucial for compatibility with older devices that do not support VLAN tagging.

Answer 280

RTO This represents the Recovery Time Objective (RTO) which is the maximum amount of time following a disaster that an individual IT system may remain offline. The Recovery Point Objective (RPO) is the amount of data loss that a system can sustain, measured in time units, and also represents the amount of data an organization is willing to lose.

Answer 281

To grant users sufficient rights to perform a job. To give rights to users implicitly. Least privilege means that a user is granted sufficient rights to perform his or her job and no more. This mitigates risk if the account should be compromised and fall under the control of a threat actor. Role-based access define organizational roles and subjects are allocated to those roles. Users gain rights implicitly (through being assigned to a role) rather than explicitly (being assigned the right directly).

Answer 282

Dynamic Host Configuration Protocol (DHCP) snooping Address Resolution Protocol (ARP) inspection ARP inspection prevents a host attached to an untrusted port from flooding the segment with gratuitous ARP replies. ARP inspection maintains a trusted database of IP:ARP mappings. DHCP snooping is a type of switch port security setting that inspects DHCP traffic arriving on access ports to ensure that a host is not trying to spoof its MAC address.

Answer 283

Humidity Flooding

Answer 284

VoIP gateway A Voice over Internet Protocol (VoIP) gateway is a component in a VoIP phone system. This gateway, which can be software or hardware, is used to interface with a traditional analog phone system. A Voice over Internet Protocol (VoIP) Private Branch Exchange (PBX) is the core switch that controls all functions found in a VoIP system.

Answer 285

ToR The leaf layer access switches are implemented as top-of-rack (ToR) switch models. These are switch models designed to provide high-speed connectivity to a rack of server appliances. Fibre Channel over Ethernet (FCoE) is a means of delivering Fibre Channel packets over Ethernet cabling and switches. A Label Edge Router (LER) inserts or "pushes" a label or "shim" header into each packet sent from routers below it, and then forwards it to an LSR to determine the Label Switched Path (LSP) for the packet. SAWs are secure administrative workstations that are hardened and are used solely to manage servers.

Answer 286

Mesh A mesh topology is commonly used in WANs. In theory, a mesh network requires that each device has a point-to-point link with every other device on the network (fully connected).

Answer 287

PTR A reverse DNS query returns the hostname associated with a given IP address. This information is stored in a reverse lookup zone as a pointer (PTR) record. A Service (SRV) record is used to identify a record that is providing a network service or protocol. It is often used to locate Voice over Internet Protocol (VoIP) or media servers.

Answer 288

BGP BGP has an administrative distance of 20. An administrative distance (AD) value can express the relative trustworthiness of the protocol supplying the route. EIGRP has an administrative distance of 90. Default AD values are coded into the router but can be adjusted by the administrator if necessary. OSPF has an administrative distance of 110. Each routing protocol uses its metric to determine the least-cost path. Unknown has an administrative distance of 255. As routing protocols use different methods to calculate the metric, a network technician cannot compare routes from other protocols in the overall IP routing table, so it uses AD values.

Answer 289

WPA2-Enterprise WPA2-Enterprise allows clients to pass on employees' user credentials to gain access to the AP. WPA2, in general, uses Wi-Fi encryption with Advanced Encryption Standard (AES) and Cipher Block Chaining Message Authentication Code Protocol (CCMP). WPA2-Personal uses encryption with AES and CCMP but uses a pre-shared key (PSK) that all users will use to access the AP

Answer 290

Performance is not adversely affected during failover The major advantage of active-passive configurations is that performance remains stable during failover. Since the passive node is on standby and not processing connections until needed, the transition from the active to the passive node does not adversely affect performance. Active-passive configurations can actually be more expensive due to the unused capacity of the passive node. They do not inherently allow for unlimited scalability; scalability depends on the specific implementation and infrastructure. A virtual IP is still needed in active-passive configurations to provide a single access point for clients.

Answer 291

A rogue DHCP server

Answer 292

Bandwidth Generally, bandwidth refers to the amount of transferable data through a connection over a given period.

Answer 293

interface VLAN50 ip address 192.168.50.1 255.255.255.0

Answer 294

Basic Service Set Identifier (BSSID)

Answer 295

Cat 5 The American National Standards Institute (ANSI) and the Telecommunications Industry Association (TIA)/Electronic Industries Alliance (EIA) have created categories and standards for twisted pair cabling. Cat 5 cabling supports a maximum speed of 100 Mbps. Cat 3 cabling is the oldest cabling standard among the choices. This twisted pair cable type supports speeds up to 10 Mbps. Cat 6 defines a modern implementation of twisted pair cabling that supports speeds up to 10 Gbps. Cat 5e defines an improvement of Cat 5 cabling by improving speeds from 100 Mbps to 1 Gbps.

Answer 296

Cloud Access Security Broker (CASB) A Cloud Access Security Broker (CASB) would most effectively address the organization's security challenges by providing a set of technologies designed to mediate access to cloud services. CASBs enforce strict access controls, enable single sign-on authentication, scan for malware, monitor and audit user and resource activity, and mitigate data exfiltration, directly aligning with the organization's needs. A Secure Web Gateway (SWG) provides safe access to the Internet and cloud services by enforcing security policies and filtering unwanted software. However, it does not offer the broad range of specific functionalities (such as single sign-on or detailed user activity monitoring) that a CASB does, making CASB the more effective choice for the organization's stated needs.

Answer 297

255.255.255.0 IP addresses are divided into classes. The most common of these are Classes A, B, and C. Each address class has a different default subnet mask. To identify an IP address's class, look at its first octet. Class A networks use a default subnet mask of 255.0.0.0 and have 0-126 as their first octet. Class B networks use a default subnet mask of 255.255.0.0 and have 128-191 as their first octet. Class C networks use a default subnet mask of 255.255.255.0 and have 192-223 as their first octet.

Answer 298

Decreased latency for data transmission Enhanced security through a private connection

Answer 299

Deny by default "Deny by default" is most closely associated with the principle of least privilege access in Zero Trust Architecture (ZTA). This approach ensures that access is denied unless explicitly granted, aligning with the idea that users should only have the minimum necessary permissions to perform their tasks. "Never trust, always verify" is a core principle of ZTA, but it emphasizes ongoing verification rather than specifically addressing least privilege.

Answer 300

Providing robust and scalable inter-domain routing

Answer 301

To maintain information about VLAN configurations and assignments

Answer 302

It increases the available bandwidth and potential data throughput It decreases the number of available channels, potentially causing more interference

Answer 303

The implementation of the USM The implementation of the User-based Security Model (USM) is CRUCIAL for ensuring that SNMP traps are securely transmitted and received in an SNMPv3 environment. USM provides authentication and encryption, which are key to securing SNMP messages.

Answer 304

Enabling port mirroring on a switch Enabling port mirroring on a switch is best for capturing packets on a specific network segment without interrupting network traffic. Port mirroring allows a copy of the traffic from one or more ports to be sent to a monitoring port where packet capture can be performed. This method is non-intrusive and doesn't affect the flow of traffic on the network, making it ideal for real-time monitoring.

Answer 305

The implementation of real-time correlation rules The MOST CRUCIAL feature of a SIEM system for detecting security incidents in real-time is the implementation of real-time correlation rules. These rules allow the SIEM to analyze log data as it is received, identifying patterns or sequences of events that indicate a security incident.

Answer 306

A network protocol analyzer A network protocol analyzer is BEST SUITED for capturing and analyzing real-time network traffic to diagnose performance issues. This tool allows you to inspect individual packets, analyze traffic flow, and identify potential bottlenecks or misconfigurations at a granular level. While a network management system can provide an overview of network performance, it is not as specialized for real-time traffic capture and detailed analysis as a protocol analyzer. Syslog servers and configuration management tools serve different purposes and are not focused on real-time traffic analysis.

Answer 307

DHCP Exclusions

Answer 308

Console A console connection is typically used for the initial setup of network devices, such as routers and switches, especially when the device has not yet been configured to communicate over the network. SSH and Telnet are used for remote management after the device is network-ready, and an API is used for programmatic control of network devices.

Answer 309

Disable DTP (Dynamic Trunk Protocol) on all switch ports Disabling DTP on all switch ports would best prevent VLAN hopping attacks by ensuring that ports do not dynamically negotiate trunking, which could otherwise allow unauthorized devices to send frames with 802.1Q tags.

Answer 310

Using DAI to validate ARP packets Using Dynamic ARP Inspection (DAI) to validate ARP packets is the most effective technique for mitigating ARP-related attacks. DAI ensures that only legitimate ARP responses are accepted by verifying each ARP packet against a trusted database of IP-to-MAC address mappings, effectively preventing ARP spoofing and other related attacks.

Answer 311

"Can you describe exactly what happens when the slowdown occurs?"

Answer 312

Investigate potential environmental factors that may be contributing to the issue

Answer 313

Excessive fragmentation at the IP layer Excessive fragmentation at the IP layer is not typically responsible for runts. Runts are usually caused by physical layer issues like duplex mismatches, cable faults, and network collisions. Fragmentation affects packets at the network layer, not the frame size at the data link layer.

Answer 314

Increasing the size of the broadcast domain

Answer 315

Configuring routing protocols on network devices

Answer 316

LLDP LLDP operates at Layer 2 of the OSI model and is used for network discovery, allowing administrators to identify devices and their network details within a local network segment. Nmap operates at a higher level for network scanning, while traceroute and nslookup are used for path tracing and DNS queries, respectively.

Answer 317

Round-robin

Answer 318

All of the above

Answer 319

A dedicated physical connection provided by a Direct Connect partner

Answer 320

Window size The TCP feature used to control the flow of data to prevent network congestion is the window size. It determines the amount of data that can be sent before receiving an acknowledgment from the receiver.

Answer 321

A medium-sized enterprise

Answer 322

To provide efficient internal routing within an autonomous system

Answer 323

Increased network redundancy and reliability

Answer 324

It provides a hierarchical structure to organize and access network management data

Answer 325

Using a network tap

Answer 326

Expanding physical bandwidth

Answer 327

DoT and DoH

Answer 328

Buffer overflow

Answer 329

Implementing IPsec to encrypt ARP traffic

Answer 330

The organization used asymmetric encryption, and the key intended for clients must be distributed securely

Answer 331

Intermittent connectivity with no clear pattern

Answer 332

A malfunctioning NIC on the server

Answer 333

A missing or misconfigured default route

Answer 334

Packet scheduling

Answer 335

Static NAT

Answer 336

High latency due to signal travel distance

Answer 337

Each leaf switch is connected to every spine switch

Answer 338

Cloud-based security services SASE (Secure Access Service Edge) is a network security framework that combines WAN capabilities with cloud-delivered security. Its core idea is to move security functions (like firewall, secure web gateway, CASB, and zero-trust network access) to the cloud, so users and devices are protected regardless of location.

Answer 339

Complication of peer-to-peer communications

Answer 340

A small team working in a remote location without established network infrastructure Ad hoc networks are peer-to-peer networks where devices communicate directly with each other without relying on a central router, access point, or existing infrastructure.

Answer 341

The amount of available space for future equipment expansion

Answer 342

Implementing hot and cold aisle containment to manage air circulation

Answer 343

RTT Round-trip time (RTT) is MOST CRUCIAL for identifying latency issues in a network. RTT measures the time it takes for a packet to travel from the source to the destination and back, making it a direct indicator of latency.

Answer 344

It defines a standard for port-based network access control, allowing only authenticated devices to connect

Answer 345

Review the configuration settings to ensure they were applied correctly

Answer 346

Learning Blocking – The port does not forward frames and does not learn MAC addresses. Listening – The port listens for BPDUs to prevent loops but does not learn MAC addresses. Learning – The port learns MAC addresses from incoming frames but still does not forward traffic. Forwarding – The port forwards traffic and continues to learn MAC addresses.

Answer 347

Excessive broadcast traffic on the network

Answer 348

Devices receiving IP addresses outside the intended subnet

Answer 349

Identifying cable continuity

Answer 350

To notify the sender that the data has been received successfully

Answer 351

By delaying the transmission of certain types of traffic to prevent congestion

Answer 352

Simplified deployment and scalability of applications

Answer 353

Symmetric key cryptography for authenticating NTP messages

Answer 354

Larger MTU sizes reduce the overhead per packet, increasing efficiency

Answer 355

EAP-TLS 802.1X

Answer 356

It enables better airflow control by isolating hot and cold air zones

Answer 357

The implementation of authentication protocols

Answer 358

It enables highly accurate synchronization of clocks in devices within a local network PTP (Precision Time Protocol, IEEE 1588) is designed to synchronize clocks to sub-microsecond accuracy across devices in a local area network (LAN).

Answer 359

Implementing security controls to mitigate risks

Answer 360

Disabling unused ports and services on the server

Answer 361

How the change will impact network performance under peak load

Answer 362

Inconsistent network connectivity between devices

Answer 363

MAC addresses learned on the interface

network review Flashcards

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