Computer Networking MCQs
Practice Computer Networking MCQs covering LAN, MAN, WAN, PAN, topology, modem, router, hub, switch and IP address concepts.
Question #21
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Which network layer protocol is used for error reporting and diagnostic functions?
Correct Answer: Option A
Explanation:
ICMP (Internet Control Message Protocol) is used for error messages and diagnostics like ping.
ICMP (Internet Control Message Protocol) is used for error messages and diagnostics like ping.
This question belongs to:
Computer
Computer Networking
Question #22
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What is the main difference between a hub and a switch?
Correct Answer: Option B
Explanation:
A hub sends data to all ports, while a switch learns MAC addresses and sends only to the destination port.
A hub sends data to all ports, while a switch learns MAC addresses and sends only to the destination port.
This question belongs to:
Computer
Computer Networking
Question #23
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Which topology is commonly used in modern Ethernet networks?
Correct Answer: Option C
Explanation:
Star topology with a central switch is the most common topology in modern Ethernet LANs.
Star topology with a central switch is the most common topology in modern Ethernet LANs.
This question belongs to:
Computer
Computer Networking
Question #24
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What is the purpose of a default gateway?
Correct Answer: Option C
Explanation:
A default gateway is a router that connects a local network to external networks, forwarding traffic when the destination is not local.
A default gateway is a router that connects a local network to external networks, forwarding traffic when the destination is not local.
This question belongs to:
Computer
Computer Networking
Question #25
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What is the loopback IP address in IPv4?
Correct Answer: Option D
Explanation:
127.0.0.1 is the loopback address used for testing network software on the local machine.
127.0.0.1 is the loopback address used for testing network software on the local machine.
This question belongs to:
Computer
Computer Networking
Question #26
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Which protocol is used to automatically assign IP addresses to devices in a network?
Correct Answer: Option D
Explanation:
DHCP (Dynamic Host Configuration Protocol) dynamically assigns IP addresses and other network parameters.
DHCP (Dynamic Host Configuration Protocol) dynamically assigns IP addresses and other network parameters.
This question belongs to:
Computer
Computer Networking
Question #27
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What is a collision domain?
Correct Answer: Option B
Explanation:
A collision domain is a network segment where packets can collide with each other if transmitted simultaneously.
A collision domain is a network segment where packets can collide with each other if transmitted simultaneously.
This question belongs to:
Computer
Computer Networking
Question #28
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Which network device operates at both physical and data link layers?
Correct Answer: Option C
Explanation:
Switches operate at layer 2 (data link) and have physical layer capabilities for receiving/transmitting signals.
Switches operate at layer 2 (data link) and have physical layer capabilities for receiving/transmitting signals.
This question belongs to:
Computer
Computer Networking
Question #29
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What is the maximum data rate of a standard Ethernet (10BASE-T) network?
Correct Answer: Option A
Explanation:
10BASE-T offers 10 Mbps; it is the original Ethernet standard over twisted pair.
10BASE-T offers 10 Mbps; it is the original Ethernet standard over twisted pair.
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Computer
Computer Networking
Question #30
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Which of the following topologies is most expensive to implement due to cabling?
Correct Answer: Option D
Explanation:
Mesh topology requires a dedicated connection between every pair of nodes, making it the most expensive.
Mesh topology requires a dedicated connection between every pair of nodes, making it the most expensive.
This question belongs to:
Computer
Computer Networking
