What is the purpose of a packet header? MCQ with Answer and Explanation

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What is the purpose of a packet header?

A. Contains the actual data payload

B. Contains source and destination addresses and control information

C. Contains routing tables

D. Contains error correction codes

Answer: Option B

Solution (By JKSSB Mock Tests)

Packet headers include addressing, protocol, and other metadata for routing and reassembly.

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Practice More Computer Networking Questions

Question #1

Which network device can operate at multiple layers of the OSI model?

A. Router

B. Hub

C. Switch

D. Repeater

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Correct Answer: Option A

Explanation:
Routers operate at layer 3 (network) and sometimes higher, while switches at layer 2 and hubs at layer 1.

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Question #2

What is the purpose of a proxy server?

A. To connect network segments

B. To assign IP addresses

C. To forward packets based on IP

D. To act as an intermediary for client requests to servers

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Correct Answer: Option D

Explanation:
A proxy server forwards requests and can provide caching, anonymity, and filtering.

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Question #3

What type of communication channel allows data to move in both directions, but only one direction at a time (e.g., a standard citizen band radio)?

A. Full-Duplex

B. Half-Duplex

C. Multiplex

D. Simplex

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Correct Answer: Option B

Explanation:
Half-duplex communication allows bidirectional traffic, but devices must alternate sending and receiving to prevent data collisions.

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