Networking Mock Questions

Question 1

How many host addresses are available on the network 172.16.128.0 with a subnet mask of 255.255.259.0?

a. 510

b. 2048

c. 1024

d. 1022 ✅

Question 2

Match the protocol with its associated port number:

FTP: 21

DNS: 53

SMTP: 25

Telnet: 23

DHCP: 67/68

Question 3

Which of the following statements describes a WAN?

a. 60 computer systems connected through switches and hubs spread over many buildings

b. Provides connectivity on a LAN

c. Many networks connected in a small campus or building

d. Provides connectivity over a large geographic area ✅

Question 4

What is the key difference between TCP and UDP?

a. TCP is connection-oriented, while UDP is connectionless ✅

b. TCP is used for local networks, while UDP is used for the internet

c. TCP requires a three-way handshake, while UDP does not

d. UDP guarantees data delivery, while TCP does not

Question 5

Acknowledgments, sequencing, and flow control are characteristics of which OSI layer?

a. Layer 2

b. Layer 3

c. Layer 4 ✅

d. Layer 7

Question 6

What is the maximum recommended length for a single segment of UTP cable in a LAN?

a. 90 meters

b. 50 meters

c. 100 meters ✅

d. 200 meters

Question 7

In the IPv6 address structure, how many bits are included in each field (hexadecimal)?

a. 4

b. 128

c. 24

d. 3

e. 16 ✅

Question 8

What device is considered an intermediary device?

a. Routers ✅

b. Wireless Access Points ✅

c. Printers

d. Switches ✅

e. Loops

f. PCs

g. File servers

Question 9

What is the role of the presentation layer in the OSI model?

a. Encrypting and compressing application layer data ✅

b. Assigning IP addresses to devices

c. Handling error detection and correction

d. Routing data between networks

Question 10

In VLSM, how does subnetting contribute to efficient IP address allocation?

a. Minimizes IP address wastage ✅

b. Creates smaller collision domains

c. Maximizes the security

d. Minimizes broadcast domains

Question 11

What is the main limitation of classful IPv4 addressing?

a. It wastes IP addresses due to fixed network sizes ✅

b. It only works with IPv6

c. It does not support routing protocols

d. It supports too many hosts per network

Question 12

What is the function of a gateway in a network?

a. To store routing tables for all network devices

b. To connect two different networks and forward packets between them ✅

c. To assign IP addresses to devices dynamically

d. To encrypt data for secure transmission

Question 13

What is the purpose of the Dynamic Host Configuration Protocol (DHCP)?

a. To establish and maintain network connections

b. To dynamically assign IP addresses to network devices ✅

c. To translate domain names to IP addresses

d. To transfer files between computers

Question 14

Packet Switching Achievements (Choose 2):

a. Secures the communication as only packets from one source use the communications link

b. Increases the reliability of network communications ✅

c. Separate pieces of each message can travel across different paths to destination ✅

d. Reduces the amount of overhead that is needed in the communication

Question 15

Multiplexing and demultiplexing are the services facilitated by the transport layer.

True ✅

False

Question 16

What is the prefix length notation for the subnet mask 255.255.255.224?

a. /27 ✅

b. /26

c. /25

d. /28

Question 17

TCP is a connection-oriented protocol, whereas UDP is a connectionless protocol.

True ✅

False

Question 18

Which IPv6 address type is globally unique and routable over the Internet?

a. Global unicast address ✅

b. Link-local address

c. Multicast address

d. Anycast address

Question 19

In a subnetted network, what does borrowing bits from the host portion achieve?

a. Increases the number of available hosts

b. Creates smaller subnets ✅

c. Prevents broadcast traffic

d. Converts IPv4 addresses into IPv6

Question 20

Why do large networks divide hosts into sub-networks?

a. To increase the number of IP addresses available

b. To eliminate the need for routing

c. To reduce the number of MAC addresses in the network

d. To improve performance and security ✅

Question 21

Which sentence gives the correct definition for scalability in the network?

a. Limits the impact of hardware or software failures and provides failure recovery mechanisms

b. Supports expansion of the network infrastructure to support new users and applications ✅

c. Provides confidential and business critical information to users without alteration

Question 22

Which protocol is responsible for sending email messages?

a. SMTP ✅

b. FTP

c. POP3

d. IMAP

Question 23

A network administrator divides the 192.168.10.0/24 network into subnets using /26 masks, How many subnets of equal size are created?

a. 4 ✅

b. 62

c. 64

d. 8

Question 24

Match the related network and broadcast address in the diagram above.

Network 1: 192.168.45.0 - 192.168.45.255

Network 2: 163.15.0.0 - 163.15.255.255

Network 3: 10.0.0.0 - 10.255.255.255

Network 4: 172.16.0.0 - 172.16.255.255

Question 25

How many usable hosts are available in a subnet with a /30 mask?

a. 2 ✅

b. 4

c. 6

d. 8

Question 26

What is the subnet mask for a network that allows for 500 usable hosts?

a. 255.255.255.0

b. 255.255.254.0 ✅

c. 255.255.252.0

d. 255.255.248.0

Question 27

Which of the following is a benefit of using NAT (Network Address Translation)?

a. Increases network security

b. Allows multiple devices to share a single public IP address

c. Enables private IP addresses to be used on the public Internet

d. All of the above ✅

Question 28

What type of network topology connects all devices to a central hub?

a. Star ✅

b. Ring

c. Bus

d. Mesh

Question 29

What is the primary function of a router?

a. To connect devices within the same local network

b. To forward data packets between different networks ✅

c. To filter traffic based on MAC addresses

d. To provide wireless connectivity

Question 30

Which layer of the OSI model is responsible for establishing, maintaining, and terminating connections?

a. Application Layer

b. Transport Layer ✅

c. Network Layer

d. Data Link Layer

Question 31

ServerA is attempting to reach PC1. Which two statements correctly indicate the address that ServerA will generate during the process? (Choose two)

a. ServerA will generate a frame with the destination MAC address of Switch 2

b. ServerA will generate a packet with the destination IP address of Router 1

c. ServerA will generate a frame with the destination MAC address of Router 1

d. ServerA will generate a packet with the destination IP address of PC1 ✅

e. ServerA will generate a packet with the destination IP address of Router 2

f. ServerA will generate a frame with the destination MAC address of Router 2 ✅

Networking Mock Questions

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