Which network device can operate at multiple layers of the OSI model? MCQ with Answer and Explanation

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

A. Hub

B. Router

C. Repeater

D. Switch

Answer: Option B

Solution (By JKSSB Mock Tests)

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

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Question #1

Which device is used to reduce network congestion by dividing a network into collision domains?

A. Modem

B. Repeater

C. Switch

D. Hub

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Correct Answer: Option C

Explanation:
A switch creates separate collision domains for each port, reducing collisions.

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Question #2

Which topology is commonly used for fiber-optic networks?

A. Mesh

B. Bus

C. Star

D. Ring

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Correct Answer: Option C

Explanation:
Fiber-optic networks often use star topology with active switches or hubs.

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Question #3

Which network topology is often used in wireless mesh networks?

A. Star

B. Bus

C. Ring

D. Mesh

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Correct Answer: Option D

Explanation:
Wireless mesh networks often use full or partial mesh topology for redundancy.

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