Computer Networking MCQs

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Computer Networking MCQs

Practice Computer Networking MCQs covering LAN, MAN, WAN, PAN, topology, modem, router, hub, switch and IP address concepts.

325
Total Questions

Practice Questions

Page 7 of 17
Question #121
What is the maximum speed of Gigabit Ethernet?
A. 100 Gbps
B. 1 Gbps
C. 10 Gbps
D. 100 Mbps
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Correct Answer: Option B

Explanation:
Gigabit Ethernet supports 1 Gbps (1000 Mbps).
This question belongs to: Computer Computer Networking
Question #122
Which protocol is used to access and view web pages?
A. FTP
B. SMTP
C. DNS
D. HTTP
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Correct Answer: Option D

Explanation:
HTTP (Hypertext Transfer Protocol) is used for retrieving web pages.
This question belongs to: Computer Computer Networking
Question #123
What is the significance of the first octet in an IP address?
A. It identifies the broadcast domain
B. It determines the network class
C. It determines the subnet mask
D. It identifies the host
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Correct Answer: Option B

Explanation:
The first octet of an IP address indicates the class (A, B, C, etc.) based on the leading bits.
This question belongs to: Computer Computer Networking
Question #124
Which of the following is a non-routable (private) IP address?
A. 8.8.8.8
B. 1.1.1.1
C. 192.168.1.100
D. 203.0.113.100
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Correct Answer: Option C

Explanation:
192.168.x.x is private and not routable on the public Internet.
This question belongs to: Computer Computer Networking
Question #125
What is the purpose of a cable tester in networking?
A. To assign IP addresses
B. To verify cable continuity and wiring
C. To measure network speed
D. To connect networks
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Correct Answer: Option B

Explanation:
Cable testers check for opens, shorts, and proper pinouts in network cables.
This question belongs to: Computer Computer Networking
Question #126
Which network topology is often used in wireless mesh networks?
A. Ring
B. Mesh
C. Bus
D. Star
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Correct Answer: Option B

Explanation:
Wireless mesh networks often use full or partial mesh topology for redundancy.
This question belongs to: Computer Computer Networking
Question #127
What is the function of a load balancer?
A. Assigns IP addresses
B. Resolves domain names
C. Distributes network traffic across multiple servers
D. Blocks malicious traffic
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Correct Answer: Option C

Explanation:
Load balancers distribute incoming requests across servers to ensure availability and performance.
This question belongs to: Computer Computer Networking
Question #128
Which layer of the TCP/IP model corresponds to the OSI network layer?
A. Link layer
B. Application layer
C. Internet layer
D. Transport layer
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Correct Answer: Option C

Explanation:
In TCP/IP, the Internet layer corresponds to the OSI network layer, handling routing and IP.
This question belongs to: Computer Computer Networking
Question #129
What is a disadvantage of a bus topology?
A. High cost
B. Difficult to troubleshoot
C. Complex cabling
D. Requires active hubs
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Correct Answer: Option B

Explanation:
Bus topology can be difficult to troubleshoot because a single faulty node or cable can affect the entire network.
This question belongs to: Computer Computer Networking
Question #130
Which protocol is used for remote terminal access?
A. SSH
B. SMTP
C. HTTP
D. FTP
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Correct Answer: Option A

Explanation:
SSH (Secure Shell) provides secure remote terminal access and command execution.
This question belongs to: Computer Computer Networking
Question #131
What is the role of a network hub?
A. To route data between networks
B. To assign IP addresses
C. To receive and forward data to all connected ports
D. To filter data based on MAC
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Correct Answer: Option C

Explanation:
A hub broadcasts incoming data to all other ports, acting as a multiport repeater.
This question belongs to: Computer Computer Networking
Question #132
Which topology uses a single communication line to which all devices are attached?
A. Bus
B. Ring
C. Mesh
D. Star
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Correct Answer: Option A

Explanation:
Bus topology uses a single cable (backbone) to which all devices connect.
This question belongs to: Computer Computer Networking
Question #133
What is the purpose of a packet header?
A. Contains source and destination addresses and control information
B. Contains routing tables
C. Contains the actual data payload
D. Contains error correction codes
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Correct Answer: Option A

Explanation:
Packet headers include addressing, protocol, and other metadata for routing and reassembly.
This question belongs to: Computer Computer Networking
Question #134
Which of the following is a well-known port for FTP data transfer?
A. 21
B. 22
C. 23
D. 20
Discuss
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Correct Answer: Option D

Explanation:
FTP uses port 20 for data transfer and port 21 for control.
This question belongs to: Computer Computer Networking
Question #135
What is the main difference between a bridge and a switch?
A. Bridge has more ports than a switch
B. Bridge works at layer 3; switch at layer 2
C. No difference
D. Switch is a multiport bridge
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Correct Answer: Option D

Explanation:
A switch is essentially a multiport bridge with hardware-based forwarding.
This question belongs to: Computer Computer Networking
Question #136
Which class of IP address is reserved for experimental purposes?
A. Class A
B. Class D
C. Class C
D. Class E
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Correct Answer: Option D

Explanation:
Class E (240.0.0.0 to 255.255.255.255) is reserved for experimental and future use.
This question belongs to: Computer Computer Networking
Question #137
What is the primary function of a network switch?
A. To connect to the Internet
B. To broadcast signals
C. To route packets based on IP addresses
D. To forward frames based on MAC addresses
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Correct Answer: Option D

Explanation:
Switches forward frames at the data link layer using MAC address tables.
This question belongs to: Computer Computer Networking
Question #138
Which protocol is used to retrieve email from a server?
A. POP3
B. SMTP
C. FTP
D. HTTP
Discuss
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Correct Answer: Option A

Explanation:
POP3 (Post Office Protocol) is used to download email from a server to a client.
This question belongs to: Computer Computer Networking
Question #139
What does the acronym NAT stand for?
A. Network Address Tracking
B. Network Access Translation
C. Network Address Translation
D. Node Address Translation
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Correct Answer: Option C

Explanation:
NAT maps private IP addresses to a public IP for internet access.
This question belongs to: Computer Computer Networking
Question #140
Which device is used to extend a network's physical range by amplifying signals?
A. Gateway
B. Repeater
C. Router
D. Switch
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Correct Answer: Option B

Explanation:
A repeater amplifies and regenerates signals to extend cable length.
This question belongs to: Computer Computer Networking

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