Which network topology uses a backbone cable to which all devices are connected via drop lines? MCQ with Answer and Explanation

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Which network topology uses a backbone cable to which all devices are connected via drop lines?

A. Mesh

B. Ring

C. Star

D. Bus

Answer: Option D

Solution (By JKSSB Mock Tests)

Bus topology uses a single backbone cable and each device connects to it via a drop line.

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Question #1

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Which device is used to extend a network's physical range by amplifying signals?

A. Gateway

B. Router

C. Repeater

D. Switch

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Correct Answer: Option C

Explanation:
A repeater amplifies and regenerates signals to extend cable length.

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Question #2

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What is the function of a firewall in a network?

A. To assign IP addresses

B. To allow or block network traffic based on rules

C. To route packets

D. To resolve domain names

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Correct Answer: Option B

Explanation:
A firewall filters network traffic based on security rules to protect the network.

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Question #3

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Which of the following is a port used by DNS?

A. 25

B. 80

C. 53

D. 443

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Correct Answer: Option C

Explanation:
DNS uses port 53 (both TCP and UDP).

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