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. Transport layer

B. Session layer

C. Data link layer

D. Network layer

Answer: Option A

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

What is the function of a modem's modulation?

A. Converts analog to digital

B. Converts digital signals to analog for transmission

C. Amplifies signals

D. Filters signals

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Correct Answer: Option B

Explanation:
Modulation converts digital data from a computer into analog signals suitable for transmission over telephone lines.

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Question #2

Which network utility allows an administrator to view the exact sequence of routers and hops that a data packet traverses to reach a remote server?

A. NSLOOKUP

B. IPCONFIG

C. PING

D. TRACERT / TRACEROUTE

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Correct Answer: Option D

Explanation:
The traceroute (Unix) or tracert (Windows) command maps a packet's path through a network, listing each intermediate hop and router interface.

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Question #3

What is the range of Class C IP addresses?

A. 128.0.0.0 to 191.255.255.255

B. 1.0.0.0 to 126.255.255.255

C. 192.0.0.0 to 223.255.255.255

D. 224.0.0.0 to 239.255.255.255

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Correct Answer: Option C

Explanation:
Class C ranges from 192.0.0.0 to 223.255.255.255.

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