Which protocol is used to prevent loops in a switched network? MCQ with Answer and Explanation

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Which protocol is used to prevent loops in a switched network?

A. STP (Spanning Tree Protocol)

B. RIP

C. OSPF

D. BGP

Answer: Option A

Solution (By JKSSB Mock Tests)

Spanning Tree Protocol (STP) prevents loops in networks with redundant links.

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Question #1

Which network device operates at both physical and data link layers?

A. Hub

B. Gateway

C. Switch

D. Router

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Correct Answer: Option C

Explanation:
Switches operate at layer 2 (data link) and have physical layer capabilities for receiving/transmitting signals.

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Question #2

Which layer of the OSI model is responsible for establishing, managing, and terminating sessions?

A. Application layer

B. Transport layer

C. Presentation layer

D. Session layer

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Correct Answer: Option D

Explanation:
The session layer (layer 5) manages communication sessions.

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Question #3

Which network device is used to connect two different network segments and forward frames based on MAC addresses?

A. Bridge

B. Router

C. Repeater

D. Hub

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Correct Answer: Option A

Explanation:
A bridge connects two network segments and forwards frames based on MAC addresses, operating at layer 2.

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