Computer Networking MCQs
Practice Computer Networking MCQs covering LAN, MAN, WAN, PAN, topology, modem, router, hub, switch and IP address concepts.
Question #71
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What is the range of dynamic ports in TCP/UDP?
Correct Answer: Option C
Explanation:
Dynamic or private ports are from 49152 to 65535, used for temporary sessions.
Dynamic or private ports are from 49152 to 65535, used for temporary sessions.
This question belongs to:
Computer
Computer Networking
Question #72
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Which network device can operate at multiple layers of the OSI model?
Correct Answer: Option B
Explanation:
Routers operate at layer 3 (network) and sometimes higher, while switches at layer 2 and hubs at layer 1.
Routers operate at layer 3 (network) and sometimes higher, while switches at layer 2 and hubs at layer 1.
This question belongs to:
Computer
Computer Networking
Question #73
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What is the main disadvantage of a ring topology?
Correct Answer: Option B
Explanation:
In ring topology, if one link fails, the entire network fails unless it uses a dual-ring design.
In ring topology, if one link fails, the entire network fails unless it uses a dual-ring design.
This question belongs to:
Computer
Computer Networking
Question #74
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Which protocol is used for sending email between servers?
Correct Answer: Option C
Explanation:
SMTP (Simple Mail Transfer Protocol) is used for sending email from client to server and between servers.
SMTP (Simple Mail Transfer Protocol) is used for sending email from client to server and between servers.
This question belongs to:
Computer
Computer Networking
Question #75
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What is the network address for a network with IP 192.168.1.150 and subnet mask 255.255.255.0?
Correct Answer: Option D
Explanation:
With a /24 mask, the network address is obtained by ANDing the IP with mask, resulting in 192.168.1.0.
With a /24 mask, the network address is obtained by ANDing the IP with mask, resulting in 192.168.1.0.
This question belongs to:
Computer
Computer Networking
Question #76
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Which device is used to connect a computer to a digital subscriber line (DSL) service?
Correct Answer: Option B
Explanation:
A DSL modem connects a computer or router to the telephone line for DSL internet.
A DSL modem connects a computer or router to the telephone line for DSL internet.
This question belongs to:
Computer
Computer Networking
Question #77
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What is the purpose of a proxy server?
Correct Answer: Option D
Explanation:
A proxy server forwards requests and can provide caching, anonymity, and filtering.
A proxy server forwards requests and can provide caching, anonymity, and filtering.
This question belongs to:
Computer
Computer Networking
Question #78
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Which topology is most suitable for fault-tolerant networks?
Correct Answer: Option A
Explanation:
Mesh topology provides multiple paths, so failure of one link does not disconnect the network.
Mesh topology provides multiple paths, so failure of one link does not disconnect the network.
This question belongs to:
Computer
Computer Networking
Question #79
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What is the primary function of a switch's MAC address table?
Correct Answer: Option A
Explanation:
A switch's MAC address table learns which MAC address is associated with which port for efficient forwarding.
A switch's MAC address table learns which MAC address is associated with which port for efficient forwarding.
This question belongs to:
Computer
Computer Networking
Question #80
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Which command is used to test network connectivity between two hosts?
Correct Answer: Option A
Explanation:
ping sends ICMP echo requests to test connectivity.
ping sends ICMP echo requests to test connectivity.
This question belongs to:
Computer
Computer Networking
