1
Q
What two port numbers are commonly associated with FTP?
A
- tcp/20 (active mode data)
- tcp/21 (control)
FTP (File Transfer Protocol) transfers files between systems.
2
Q
What generic protocol is commonly used to transfer files between different operating systems?
A
File Transfer Protocol
(FTP)
FTP (File Transfer Protocol) transfers files between systems.
3
Q
What protocol would you use to securely log in to a remote device?
A
Secure Shell
(SSH)
Secure Shell can be used to access computers through an encrypted connection, preventing eavesdropping on a network.
4
Q
Name the port number:
Secure Shell
A
22
Secure Shell packets are encrypted, preventing anyone from viewing their contents with packet sniffing software.
5
Q
What protocol would you use to insecurely log into the terminal of a remote device?
A
Telnet
All information sent through Telnet can be seen by packet sniffing software.
6
Q
Fill in the blank:
The port number for Telnet is ______.
A
23
All information sent through Telnet can be seen by packet sniffing software.
7
Q
What protocol is used to transfer emails between mail servers?
A
Simple Mail Transfer Protocol
(SMTP)
SMTP is only used to move messages between servers. POP3 or IMAP is used to retrieve mail on an email server.
8
Q
What port number is used by SMTP?
A
25
9
Q
What protocol is used to resolve IP addresses from a fully qualified domain name?
(FQDN)
A
Domain Name System
(DNS)
10
Q
What port number is used by DNS?
A
53
DNS is the Domain Name System.
11
Q
What protocol is used to automatically assign IP addresses?
A
Dynamic Host Configuration Protocol
(DHCP)
DHCP uses both ports 67 and 68.
12
Q
What port numbers are used by DHCP?
A
67 and 68
DHCP is the Dynamic Host Configuration Protocol.
13
Q
What insecure protocol is commonly used to transfer web page information to a browser?
A
Hypertext Transfer Protocol
(HTTP)
HTTP (Hypertext Transfer Protocol) uses port 80.
14
Q
What is HTTP’s port number?
A
80
15
Q
What protocol is used to transfer emails from servers to devices without multi-device synchronization?
A
Post Office Protocol 3
(POP3)
16
Q
Fill in the blank:
The port number for POP3 is ______.
A
110
POP3 is the Post Office Protocol version 3.
17
Q
What protocol is used to transfer emails from servers to devices with multi-device synchronization?
A
Internet Message Access Protocol
(IMAP)
IMAP (Internet Message Access Protocol) uses port 143.
18
Q
Name the port number:
IMAP
A
143
IMAP is the Internet Message Access Protocol
19
Q
Name the port number:
LDAP
A
389
LDAP is the Lightweight Directory Access Protocol.
20
Q
Name the port number:
HTTPS
A
443
HTTPS is Hypertext Transfer Protocol Secure.
21
Q
What secure protocol is commonly used to transfer data from a web service?
A
Hypertext Transfer Protocol Secure
(HTTPS)
HTTPS (Hypertext Transfer Protocol Secure) uses port 443.
22
Q
What protocol does Windows use to access file shares and network printers?
A
Server Message Block
(SMB)
SMB is a newer version of the CIFS (Common Internet File System) protocol and uses port 445 for direct SMB communication.
23
Q
Name the port number:
Direct SMB without NetBIOS transport
A
445
SMB (Server Message Block) is commonly used in Windows for file and printer sharing.
24
Q
Name the port number:
Using SMB with NetBIOS
(NetBT)
A
137 and 139
25
What protocol is used in Windows to **remotely control** a computer’s desktop interface?
Remote Desktop Protocol
| (RDP)
## Footnote
RDP uses port 3389.
26
What is **RDP's** port number?
3389
## Footnote
RDP is the Remote Desktop Protocol.
27
# True or False:
UDP performs checks to ensure that all data sent reaches its destination.
False
## Footnote
UDP delivers data without any acknowledgements, making it a good choice for real-time voice or video communication.
28
What protocol is best for applications that require **real-time communication** with no consideration for lost data?
User Datagram Protocol
| (UDP)
29
What protocol is best for applications that **require data to be reliably delivered**?
Transmission Control Protocol
| (TCP)
## Footnote
TCP performs data acknowledgements and identifies any packets that do not make it to their destination.
30
Which **Wi-Fi frequencies** would be most commonly used in a business environment?
* 2.4 GHz
* 5 GHz
* 6 GHz
31
How are frequencies referenced on a **Wi-Fi network**?
Channels
## Footnote
Wi-Fi channels are frequency ranges. The number of channels for Wi-Fi bands depends on the band and government regulations.
32
This wireless characteristic allows for **linking channels to improve throughput**.
Channel bonding
## Footnote
Channel bonding increases the available frequency range and overall throughput of the wireless network.
33
What is **IEEE standard** for wireless LANs?
IEEE 802.11
## Footnote
IEEE stands for the Institute of Electrical and Electronics Engineers.
34
What technology uses the **2.4GHz band** to provide **short-range connectivity** to accessory devices?
Bluetooth
35
What short-range technology supports **encryption** and **contactless payment**?
Near-Field Communication
| (NFC)
## Footnote
NFC is most commonly used in smartphones for digital payment cards.
36
# True or False:
NFC is often encrypted to protect data and prevent replay attacks.
True
## Footnote
Some NFC standards can use encryption to prevent unauthorized scanning and duplication of NFC information (replay attacks).
37
What technology allows small tags to be **powered and scanned by radio waves**?
Radio-frequency identification
| (RFID)
## Footnote
Some RFID systems use powered tags for greater range.
38
This service is responsible for **converting fully-qualified domain names** to IP addresses?
Domain Name System
| (DNS)
## Footnote
While most home networks use an ISP-provided DNS, it is possible to self-host a DNS server.
39
What service provides **automatic assignment of IP addresses**?
Dynamic Host Configuration Protocol
| (DHCP)
## Footnote
Most home routers come with a built-in DHCP server.
40
What type of **service** would be provided by a NAS?
A NAS provides **network based file storage** and **sharing**.
| (Network-Attached Storage)
41
This service is used to **transfer log files** from a network device to a centralized database.
Syslog
## Footnote
Syslog is a standard protocol supported by many different network devices.
42
Which service type is commonly accessed by a **browser**?
Web server
## Footnote
The web server serves web pages to client browsers.
43
This service is used for managing **security credentials** and **login validation**.
Authentication, Authorization, and Accounting
| (AAA)
44
What service would be the best choice for **storing large amounts of data**?
Structured Query Language
| (SQL)
## Footnote
SQL database servers are commonly used to easily store and retrieve data.
45
What protocol is used for **time synchronization**?
Network Time Protocol
| (NTP)
46
What service is the best choice for **preventing unwanted emails** from reaching a user's inbox?
Spam gateway
47
What service can be used to help **direct traffic** between two or more servers?
Load balancer
## Footnote
In addition to improving traffic, load balancers can automatically react to the loss of one or more servers to provide redundancy.
48
What service can act as an **intermediary and communicate to a server** on a client's behalf?
Proxy server
49
What describes the **networking of industrial applications** such as factories and power plants?
Supervisory Control and Data Acquisition System
| (SCADA)
50
This describes a system which is **old or outdated** by modern standards.
Legacy
## Footnote
Legacy systems are not always at risk or in need of an upgrade.
51
A name for purpose-build devices that run on their own **closed operating systems**.
Embedded systems
## Footnote
Embedded systems include traffic light controllers and alarm systems.
52
Another name for **"smart" devices** used primarily for households.
Internet of Things
| (IoT)
53
# Name the DNS record:
Resolves an **IPv4 address** from an FQDN
Address
| (A)
## Footnote
The A (Address) record is used to translate between an FQDN (Fully Qualified Domain Name) and an IPv4 address.
54
# Name the DNS record:
Resolves an **IPv6 address** from an FQDN
AAAA
## Footnote
The quad-A (AAAA) Address record is used to translate between an FQDN (Fully Qualified Domain Name) and an IPv6 address.
55
# Name the DNS record:
Associate **multiple names** to a single FQDN
CNAME
## Footnote
A canonical name is used to associate multiple names to a single FQDN (Fully Qualified Domain Name).
56
# Name the DNS record:
Identify the **email server** for a recipient
MX
## Footnote
The MX (Mail Exchange) record identifies the email server associated with a recipient's fully qualified domain name (FQDN).
57
# Name the DNS TXT record type:
A **public key** used to validate email digital signatures.
DKIM
## Footnote
DKIM (DomainKeys Identified Mail) is a text record containing a public key used for email signature validation.
58
# Name the DNS TXT record type:
A list of all authorized **outgoing email servers**.
Sender Policy Framework
| (SPF)
59
# Name the DNS TXT record type:
A policy for handling email messages identified as **spam**.
Domain-based Message Authentication, Reporting, and Conformance
| (DMARC)
60
# True or False:
SPF requires the use of a TXT record to function.
True
## Footnote
SPF (Sender Policy Framework) TXT records contain a list of all authorized outgoing email server IP addresses.
61
This describes an **automatic IP address** assignment provided for a specific **timeframe**.
DHCP lease
62
What is the best way to ensure the same IP address is always **assigned to a device by a DHCP server**?
DHCP reservation
63
This is the list of IP addresses which can be **assigned by a DHCP server**.
DHCP scope
64
This contains a list of IP addresses which should **never be assigned by a DHCP server**.
DHCP exclusions
65
# Fill in the blanks:
Segmenting a switched network into separate broadcast domains is called a \_\_\_\_\_\_ \_\_\_\_\_\_.
Virtual LAN
| (VLAN)
66
# Fill in the blanks:
An encrypted tunnel between two sites or devices is called a \_\_\_\_\_\_ \_\_\_\_\_\_ \_\_\_\_\_\_.
Virtual Private Network
| (VPN)
67
# Fill in the blanks:
An encrypted link from a device to a centralized concentrator is called a \_\_\_\_\_\_ \_\_\_\_\_\_.
Client-to-site VPN
68
This describes an **encrypted tunnel** between two remote locations.
Site-to-site VPN
69
# Name the network device:
This device **forwards traffic** based on the destination IP address.
Router
70
# Fill in the blanks:
A switch forwards traffic based on the \_\_\_\_\_\_ \_\_\_\_\_\_ \_\_\_\_\_\_.
destination MAC address
| (Media Access Control)
71
# Name the network device:
This is an **inexpensive switch** with relatively few configuration options.
Unmanaged switch
72
# Name the network device:
This type of switch provides advanced features such as **VLANs**, **redundancy**, and **traffic prioritization**.
Managed switch
73
# Name the network device:
This device connects a **wired network** with a **wireless network**.
Access point
74
This component is used to **terminate wire runs** to simplify connectivity.
Patch panel
75
# Name the network device:
This device is commonly used to **allow or disallow traffic** through a specific network point or device.
Firewall
## Footnote
Many firewalls are installed at the ingress/egress points of a network.
76
What technology is used to both power and connect network devices using a **single Ethernet cable**?
Power over Ethernet
| (PoE)
## Footnote
PoE is often used on devices such as cameras, phones, and wireless access points.
77
Some of the interfaces on a switch are labeled with **PoE**, **PoE+**, or **PoE++**. What does this specify?
Power over Ethernet standards with different values for maximum watts and current.
78
# True or False:
PoE+ devices can be used on PoE++ switches.
True
79
# Name the network device:
This is used by a **cable television company** to provide **data connectivity** to the Internet.
Cable modem
80
# Name the network device:
This provides digital communication over **analog telephone lines**.
DSL modem
| (Digital Subscriber Line)
81
What does an **ONT** provide?
An ONT is used to convert from an ISP's (Internet Service Provider) **fiber connection to a copper Ethernet interface**.
| (Optical Network Terminal)
82
# Name the network device:
This component connects a device to a network.
Network Interface Card
| (NIC)
83
This is a **unique hardware identifier** associated with a network device or connection.
MAC address
| (Media Access Control)
84
# True or False:
The NIC (Network Interface Card) determines a device's MAC (Media Access Control) address.
True
85
What technology is used to **modify the source or destination IP address** during transport?
Network Address Translation
| (NAT)
86
RFC 1918 defines which **IP address ranges as private**?
10.0.0.0 -
10.255.255.255, 172.16.0.0 -
172.31.255.255, and 192.168.0.0 -
192.168.255.255.
## Footnote
These ranges are often abbreviated with CIDR-block notation as 10.0.0.0/8, 172.16.0.0/12
, and 192.168.0.0/16.
87
What type of IP addresses are limited to an internal network and **cannot be routed across the Internet**?
Private IP address
88
# True or False:
IPv6 can support a maximum of 4 trillion possible addresses.
False
## Footnote
IPv6 can support a total of 340,282,366,920,938,463,463,374,607,431,768,211,456 theoretical addresses (340 undecillion!)
89
This IP configuration setting defines the local **IP subnet size**.
Subnet mask
90
What IP configuration setting determines the best path to **communication with external IP subnets**?
Default gateway
91
# Name the Internet connection type:
This can be used in remote areas with **limited network infrastructure**. Requires line-of-sight.
Satellite
## Footnote
Satellites provide a non-terrestrial network connection from almost any location.
92
# Name the Internet connection type:
It supports **high speed data transfers** over long distances. Usually expensive to install and repair.
Fiber optics
93
# Name the Internet connection type:
This is originally used to **provide television service** but later adapted to carry Internet services.
Cable
## Footnote
The standard for using Internet over copper cables is DOCSIS (Data Over Cable Service Interface Specification).
94
# Name the Internet connection type:
It provides Internet connectivity over existing **analog phone lines**.
Digital Subscriber Line
| (DSL)
## Footnote
DSL has a range limit of around 3 kilometers from the Central Office.
95
# Name the Internet connection type:
A home Internet delivered over **wireless antenna** connections
Wireless Internet Service Provider
| (WISP)
## Footnote
WISP can be delivered through a variety of means. This includes but is not limited to: meshed 802.11, 5G, and proprietary wireless solutions.
96
# Name the network type:
A network composed of **802.11 wireless and/or Ethernet** within a building or group of buildings.
Local Area Network
| (LAN)
## Footnote
A LAN can be as simple as your own home network.
97
# Name the network type:
A network connecting sites over **long distances**.
Wide Area Network
| (WAN)
## Footnote
A WAN provides connectivity between cities, states, or countries.
98
# Name the network type:
A small, private network commonly used to wirelessly **connect headphones and other devices**.
Personal Area Network
| (PAN)
## Footnote
Bluetooth, IR, and NFC are all technologies used in a PAN.
99
# Name the network type:
A network connecting locations **within the same city or municipal area**.
Metropolitan Area Network
| (MAN)
100
# Name the network type:
A network connecting **large-scale drive arrays**.
Storage Area Network
| (SAN)
## Footnote
SANs require large amounts of bandwidth to move data effectively.
101
# Name the network type:
A Local Area Network using **802.11 wireless technology**.
Wireless Local Area Network
| (WLAN)
## Footnote
WLANs are often composed of several access points for greater area coverage.
102
# Name the network tool:
This is used to **add connectors** onto the ends of a wire.
Cable crimper
103
This tool can **remove the plastic sheath of a cable**, exposing the internal wires in preparation for attaching a connector.
Cable stripper
104
# Name the network tool:
A portable tool used to **scan and gather information** about wireless networks.
Wi-Fi analyzer
105
# Name the network tool:
This is used to pick up signals from a **tone generator**.
Inductive probe
## Footnote
Tone generators and probes are used together to help physically locate a specific cable.
106
# Name the network tool:
This is used to **attach wires** to a 110 block.
Punch down tool
## Footnote
The punch down tool will also trim the wire during the process of punching it into the block.
107
# Name the network tool:
This is used to **diagnose simple wiring issues** and continuity of the wires.
Cable tester
108
# Name the network tool:
A special cable for performing **diagnostics of a network interface**.
Loopback plug
109
# Name the network tool:
This is used with protocol analyzers to **gain access to the network packets** over physical links.
Network tap
