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CCNA Flashcards

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1
Q

What does CCNA stand for?

A

Cisco Certified Network Associate

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2
Q

True or False: CCNA certification is intended for entry-level network engineers.

A

True

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3
Q

Which layer of the OSI model is responsible for routing?

A

Layer 3 (Network Layer)

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4
Q

Fill in the blank: The primary protocol used for routing in the Internet is _____ Protocol.

A

Internet

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5
Q

What command is used to save the configuration on a Cisco router?

A

write memory or copy running-config startup-config

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6
Q

What does the acronym VLAN stand for?

A

Virtual Local Area Network

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7
Q

Which protocol is used for dynamic IP address allocation?

A

DHCP (Dynamic Host Configuration Protocol)

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8
Q

What is the default subnet mask for a Class C address?

A

255.255.255.0

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9
Q

True or False: A switch operates at Layer 2 of the OSI model.

A

True

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10
Q

What is the purpose of NAT?

A

To translate private IP addresses to a public IP address.

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11
Q

Which command would display the routing table on a Cisco router?

A

show ip route

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12
Q

What does the acronym STP stand for in networking?

A

Spanning Tree Protocol

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13
Q

Fill in the blank: The _____ address is used to identify a device on a network.

A

IP

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14
Q

What type of cable is used for connecting devices to a switch?

A

Ethernet cable

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15
Q

True or False: OSPF is a link-state routing protocol.

A

True

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16
Q

What is the function of a router?

A

To route packets between different networks.

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17
Q

What does the acronym WAN stand for?

A

Wide Area Network

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18
Q

What is the purpose of a subnet mask?

A

To determine the network and host portions of an IP address.

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19
Q

Which command is used to configure a hostname on a Cisco device?

A

hostname [desired-name]

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20
Q

What layer of the OSI model does TCP operate on?

A

Layer 4 (Transport Layer)

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21
Q

Fill in the blank: The _____ Protocol is used for secure remote login.

A

SSH (Secure Shell)

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22
Q

What is the maximum length of a standard Ethernet cable?

A

100 meters

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23
Q

True or False: A broadcast domain is limited by a router.

A

False

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24
Q

What does the acronym ACL stand for?

A

Access Control List

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25
What is the primary function of a firewall?
To control incoming and outgoing network traffic based on security rules.
26
Which routing protocol uses a distance vector algorithm?
RIP (Routing Information Protocol)
27
What is the purpose of the ping command?
To test connectivity between devices.
28
Fill in the blank: The _____ address is used to identify a specific interface on a device.
MAC (Media Access Control)
29
What does the acronym DHCP stand for?
Dynamic Host Configuration Protocol
30
What is the default administrative distance of OSPF?
110
31
True or False: The command 'show version' displays the device's operating system version.
True
32
What type of network topology connects all devices to a central hub?
Star topology
33
What is the main purpose of VLANs?
To segment networks for improved performance and security.
34
Fill in the blank: The _____ layer is responsible for data encryption and decryption.
Transport
35
What is the difference between a public and a private IP address?
Public IP addresses are routable on the internet, while private IP addresses are used within internal networks.
36
Which command would you use to see the MAC address table on a switch?
show mac address-table
37
What does the acronym QoS stand for?
Quality of Service
38
What is the purpose of the traceroute command?
To trace the path packets take to reach a destination.
39
True or False: The command 'enable' is used to enter privileged EXEC mode.
True
40
What is the function of the ARP protocol?
To map IP addresses to MAC addresses.
41
What does the acronym ISP stand for?
Internet Service Provider
42
What is a key benefit of using static routing?
It provides predictable routing behavior.
43
Which layer of the OSI model is responsible for session management?
Layer 5 (Session Layer)
44
Fill in the blank: The _____ Protocol is used to send email.
SMTP (Simple Mail Transfer Protocol)
45
What is the purpose of a demilitarized zone (DMZ) in networking?
To provide an additional layer of security for external-facing services.
46
What is Layer 3 of the OSI Model?
Network Layer: Focused on routing data and IP addressing. Routers at this layer.
47
/26 Hosts
Subnet mask: 255.255.255.192 62 Hosts
48
/24 Hosts
Subnet Mask: 255.255.255.0 254 Hosts Class C default
49
/29
Subnet Mask: 255.255.255.248 8 Hosts Class C
50
/25 Hosts
Subnet Mask: 255.255.255.128 126 Hosts Class C
51
/27
Subnet Mask: 255.255.255.224 30 Hosts Class C
52
/28
Subnet Mask: 255.255.255.240 15 Hosts Class C
53
/30 and /31
2 Hosts for /30 and point to point comms only for /31
54
Private IP Addresses in Class C
192.168.0.0/16 (192.168.0.0-192.168.255.255)
55
Private IP Addresses in Class B
172.16.0.0/12 (172.16.0.0 - 172.16.255.255)
56
Private IP Addresses in Class A
10.0.0.0/8 (10.0.0.0 - 10.255.255.255)
57
CIDR
Classless Inter-Domain Routing Allows networks to be subnetted into different sizes to save IP addresses.
58
First Octet for Class A
1-126
59
First Octet for Class B
128-191
60
First Octet for Class C
192-223
61
First Octet for Class D
224-239
62
First Octet for Class E
240-255
63
Default Subnet Mask for Class A
255.0.0.0 or /8
64
Default Subnet Mask for Class B
255.255.0.0 or /16
65
Default Subnet Mask for Class C
255.255.255.0 or /24
66
Routers operate at this OSI Layer
Layer 3 - Network
67
Switches Operate at this OSI Layer
Layer 1 - Data Link
68
TCP
Transmission Control Protocol Reliable and verified
69
UDP
User Datagram Protocol Connectionless - no formal open or close to the connection. Unreliable delivery so no confirmation info was received.
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