Network Layer Quiz: Test Your IP Addressing, Routing, and Subnetting Knowledge

Question 1

Which of the following is a valid IPv4 address format?

Accepted Answer

192.168.1.1

Answer

192.168.A.B

Answer

192.A.B.C

Answer

192.168.1.256

Question 2

Which protocol is responsible for determining the path that packets take across a network?

Accepted Answer

IP

Answer

HTTP

Answer

TCP

Answer

UDP

Question 3

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

Accepted Answer

255.255.255.0

Answer

255.0.0.0

Answer

255.255.0.0

Answer

255.255.255.128

Question 4

What is the primary purpose of a MAC address?

Accepted Answer

To uniquely identify a network interface card (NIC)

Answer

To provide security for network devices

Answer

To route packets across a network

Answer

To assign an IP address to a device

Question 5

What is the primary function of the Network Layer in the TCP/IP model?

Accepted Answer

To provide logical addressing and routing of data packets.

Answer

To ensure reliable data transmission and error correction.

Answer

To establish and maintain connections between applications.

Question 6

Which of the following is NOT a responsibility of the Network Layer?

Accepted Answer

Flow control and congestion management.

Answer

Routing data packets to their destination.

Answer

Logical addressing of devices.

Answer

Fragmentation and reassembly of packets.

Question 7

What is the purpose of IP addressing?

Accepted Answer

To uniquely identify devices on a network.

Answer

To ensure data security and privacy.

Answer

To control access to network resources.

Question 8

Which of the following is a valid IPv4 address?

Accepted Answer

192.168.1.1

Answer

256.1.1.1

Answer

10.0.0.256

Answer

172.17.1.257

Question 9

A network administrator is configuring a subnet mask for a network with 256 devices. What is the most appropriate subnet mask to use?

Accepted Answer

255.255.255.0

Answer

255.255.252.0

Answer

255.255.254.0

Question 10

What is the primary difference between a router and a switch?

Accepted Answer

Routers operate at the Network Layer, while switches operate at the Data Link Layer.

Answer

Routers connect different networks, while switches connect devices within the same network.

Answer

Routers are faster than switches.

Question 11

What is the purpose of a routing table?

Accepted Answer

To store information about network destinations and their corresponding paths.

Answer

To manage network security settings.

Answer

To track network traffic flow.

Question 12

A network administrator wants to implement a routing protocol that is efficient for small networks and can adapt quickly to changes. Which routing protocol would be most suitable?

Accepted Answer

RIP (Routing Information Protocol)

Answer

BGP (Border Gateway Protocol)

Answer

OSPF (Open Shortest Path First)

Question 13

What is a subnet?

Accepted Answer

A smaller logical division of a larger network.

Answer

A network security measure.

Answer

A physical connection between two devices.

Answer

A type of network topology.

Question 14

A network administrator is troubleshooting a network connectivity issue. The network devices can communicate with each other, but the devices cannot access the internet. Which layer of the TCP/IP model is most likely the source of the problem?

Accepted Answer

Network Layer

Answer

Transport Layer

Answer

Application Layer

Answer

Data Link Layer

Question 15

Which of the following is a valid IPv4 address?

Accepted Answer

192.168.1.1

Answer

192.168.256.1

Answer

192.168.1.256

Answer

192.168.1.0

Question 16

What is the purpose of a subnet mask?

Accepted Answer

Determine the network and host portions of an IP address

Answer

Provide a layer of security for the network

Answer

Assign IP addresses to devices

Question 17

Which of the following routing protocols is distance-vector based?

Accepted Answer

RIP

Answer

OSPF

Answer

BGP

Question 18

What is the difference between a Layer 3 switch and a router?

Accepted Answer

A router can forward packets between different networks, while a Layer 3 switch cannot

Answer

Routers are more expensive than Layer 3 switches

Answer

A Layer 3 switch has more ports than a router

Question 19

Which of the following ports is used for HTTP traffic?

Accepted Answer

80

Answer

25

Answer

21

Answer

443

Question 20

What is the purpose of TCP's three-way handshake?

Accepted Answer

Establish a reliable connection between two hosts

Answer

Authenticate the sender and receiver

Answer

Provide flow control for the data transfer

Answer

Encrypt the data being transmitted

Question 21

Which of the following is NOT a characteristic of a virtual LAN (VLAN)?

Accepted Answer

It is a physical network

Answer

It can segregate traffic by function

Answer

It can simplify network management

Answer

It can improve network security

Question 22

What is the purpose of a firewall?

Accepted Answer

To control and monitor incoming and outgoing network traffic

Answer

To provide encryption for data transmission

Answer

To detect and block malware

Question 23

Which of the following is a benefit of using cloud computing for network services?

Accepted Answer

Reduced infrastructure costs

Answer

Enhanced data security

Answer

Improved reliability

Answer

Increased network performance

Question 24

What is the role of the Domain Name System (DNS) in the network?

Accepted Answer

Translate domain names into IP addresses

Answer

Manage network traffic flow

Answer

Provide authentication for network users

Question 25

Which of the following is NOT a responsibility of the Network Layer in the TCP/IP model?

Accepted Answer

Data encryption and decryption

Answer

Logical addressing (IP addressing)

Answer

Fragmentation and reassembly of packets

Answer

Routing data packets

Question 26

A network administrator needs to assign IP addresses to 100 computers in a new office building. Which of the following IP address classes would be most appropriate?

Accepted Answer

Class C

Answer

Class D

Answer

Class B

Answer

Class A

Question 27

What is the purpose of a subnet mask?

Accepted Answer

To identify the network portion and host portion of an IP address

Answer

To encrypt data transmitted over the network

Answer

To manage the flow of data between different network devices

Question 28

Which of the following routing protocols is commonly used on the internet?

Accepted Answer

BGP (Border Gateway Protocol)

Answer

Static Routing

Answer

RIP (Routing Information Protocol)

Answer

OSPF (Open Shortest Path First)

Question 29

A network administrator is configuring a router to allow traffic from a specific IP address range to access a web server. Which of the following routing mechanisms would be most appropriate?

Accepted Answer

Access Control List (ACL)

Answer

DHCP (Dynamic Host Configuration Protocol)

Answer

NAT (Network Address Translation)

Answer

RIP (Routing Information Protocol)

Question 30

What is the primary function of a router in a network?

Accepted Answer

To forward data packets between networks

Answer

To manage the flow of data within a single network

Answer

To convert data from one format to another

Answer

To connect network devices to the internet

Question 31

You are configuring a network with a subnet mask of 255.255.255.192. How many usable host addresses are available within this subnet?

Accepted Answer

62

Answer

256

Answer

126

Answer

254

Question 32

What is the difference between a static IP address and a dynamic IP address?

Accepted Answer

A static IP address is permanently assigned to a device, while a dynamic IP address is assigned temporarily

Answer

A static IP address is used for internal networks, while a dynamic IP address is used for public networks

Question 33

Which of the following is an advantage of using a dynamic IP address allocation system?

Accepted Answer

It reduces the need for manual IP address configuration

Answer

It increases network security

Answer

It provides a permanent IP address for each device

Question 34

A network administrator wants to segment a large network into smaller, more manageable subnets. Which of the following techniques would be most appropriate?

Accepted Answer

Subnetting

Answer

NAT (Network Address Translation)

Answer

VLANs (Virtual Local Area Networks)

Answer

Routing