What is the role of a firewall in a network? MCQ with Answer and Explanation

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What is the role of a firewall in a network?

A. To protect against unauthorized access

B. To assign IP addresses

C. To route packets

D. To boost signal

Answer: Option A

Solution (By JKSSB Mock Tests)

Firewalls enforce security policies by blocking unauthorized traffic.

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Practice More Computer Networking Questions

Question #1

Which protocol is used to retrieve email from a server?

A. HTTP

B. FTP

C. POP3

D. SMTP

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Correct Answer: Option C

Explanation:
POP3 (Post Office Protocol) is used to download email from a server to a client.

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Question #2

What is the maximum number of IP addresses in a Class C network?

A. 254

B. 256

C. 65534

D. 16,777,214

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Correct Answer: Option A

Explanation:
Class C has 8 host bits, giving 2^8 = 256 addresses, with 2 reserved (network and broadcast), so 254 usable.

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Question #3

What type of network geographic classification covers a single room, home, or office building, typically utilizing Wi-Fi or Ethernet cables?

A. LAN (Local Area Network)

B. PAN (Personal Area Network)

C. WAN (Wide Area Network)

D. MAN (Metropolitan Area Network)

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Correct Answer: Option A

Explanation:
A Local Area Network (LAN) spans a small, restricted geographical area like a single school, residence, or office space.

This question belongs to: Computer Computer Networking

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