Which layer of the OSI model is responsible for end-to-end error recovery and flow control? MCQ with Answer and Explanation

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Which layer of the OSI model is responsible for end-to-end error recovery and flow control?

A. Network layer

B. Session layer

C. Transport layer

D. Data link layer

Answer: Option C

Solution (By JKSSB Mock Tests)

The transport layer (e.g., TCP) provides reliable data transfer, error recovery, and flow control.

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Question #1

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

A. Gateway

B. Router

C. Hub

D. Switch

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Correct Answer: Option D

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

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Question #2

Which address space is specifically allocated globally for network diagnostics, mapping to the 'localhost' designation inside client operating software configurations?

A. 127.0.0.1

B. 10.0.0.1

C. 192.168.1.254

D. 255.255.255.255

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Correct Answer: Option A

Explanation:
The 127.0.0.1 loopback address routes packets back internally within the local device's TCP/IP stack to support software testing.

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Question #3

What is the role of a DNS resolver?

A. To filter traffic

B. To query DNS servers for domain name resolution

C. To forward packets

D. To assign IP addresses

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Correct Answer: Option B

Explanation:
A DNS resolver is a client that initiates queries to DNS servers to translate domain names.

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