What is the purpose of a firewall's ACL (Access Control List)? MCQ with Answer and Explanation

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What is the purpose of a firewall's ACL (Access Control List)?

A. To forward packets

B. To assign IP addresses

C. To define rules for permitting or denying traffic

D. To resolve domain names

Answer: Option C

Solution (By JKSSB Mock Tests)

ACLs are used to filter network traffic based on IP, port, or other criteria.

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Question #1

Which of the following is a remote access protocol?

A. SMTP

B. Telnet

C. FTP

D. DNS

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Correct Answer: Option B

Explanation:
Telnet is a remote terminal protocol (though insecure; SSH is preferred).

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Question #2

What is the main advantage of a star topology?

A. Low cost

B. Easy to troubleshoot

C. High redundancy

D. Fault-tolerant

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Correct Answer: Option B

Explanation:
Star topology simplifies troubleshooting because each connection is independent.

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Question #3

In a physical Bus Topology, what happens if the main backbone cable line is cut anywhere along its length?

A. The line switches to half-frequency full-duplex mode.

B. All signal termination fails, causing massive signal bounce that disrupts communication across the entire layout.

C. The nearest node transforms into a hub automatically.

D. The network splits into two separate, fully functional subnets.

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Correct Answer: Option B

Explanation:
A sever in a bus network removes proper termination, causing signal reflection that corrupts data traffic for all connected devices.

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