Which network layer protocol is used for error reporting and diagnostic functions? MCQ with Answer and Explanation

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Which network layer protocol is used for error reporting and diagnostic functions?

A. ARP

B. TCP

C. ICMP

D. UDP

Answer: Option C

Solution (By JKSSB Mock Tests)

ICMP (Internet Control Message Protocol) is used for error messages and diagnostics like ping.

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Question #1

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

A. Presentation layer

B. Session layer

C. Application layer

D. Transport layer

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Correct Answer: Option B

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

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Question #2

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What form of network topology links a master hub down to secondary hub nodes, which in turn connect to individual workstations in a multi-level hierarchy?

A. Ring Topology

B. Tree / Hierarchical Star Topology

C. Mesh Topology

D. Bus Topology

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Correct Answer: Option B

Explanation:
A tree topology arranges star-configured subnets in a multi-level hierarchy connected back to a central root node.

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Question #3

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What happens if a terminator component is missing from either end of a traditional coaxial Bus Network line?

A. The data frame sizes double automatically.

B. The system re-routes all traffic to the loopback interface.

C. Signals reflect back along the cable when they hit the open end, causing signal corruption that drops the network.

D. The network transitions to a wireless ring structure.

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Correct Answer: Option C

Explanation:
Without a terminator to absorb signals at the physical endpoints of a bus network, signal bounce corrupts ongoing data traffic.

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