COMPUTER NETWORK

1. What is the primary responsibility of the Data Link Layer?

a) Error detection and correction b) Framing and flow control c) Routing and addressing d) All of the above

2. Which of the following is a design issue of the Data Link Layer?

a) Framing b) Error control c) Flow control d) All of the above

3. What is the purpose of framing in the Data Link Layer?

a) To divide data into manageable units b) To detect errors in transmission c) To control the flow of data d) To route data to the correct destination

4. Which of the following is an elementary data link protocol?

a) Stop-and-Wait ARQ b) Go-Back-N ARQ c) Selective Repeat ARQ d) All of the above

5. What is the main purpose of error control in the Data Link Layer?

a) To detect and correct errors in transmitted data b) To manage the flow of data c) To route data to the correct destination d) To divide data into frames

6. Which protocol ensures reliable data transfer by retransmitting lost frames?

a) Stop-and-Wait ARQ b) Go-Back-N ARQ c) Selective Repeat ARQ d) All of the above

7. What is the primary disadvantage of the Stop-and-Wait ARQ protocol?

a) Low efficiency b) High complexity c) High latency d) All of the above

8. Which protocol allows multiple frames to be in transit at the same time?

a) Stop-and-Wait ARQ b) Go-Back-N ARQ c) Selective Repeat ARQ d) Both b and c

9. What is the purpose of flow control in the Data Link Layer?

a) To prevent the sender from overwhelming the receiver b) To detect errors in transmission c) To divide data into frames d) To route data to the correct destination

10. Which of the following is a method for error detection?

a) CRC (Cyclic Redundancy Check) b) Checksum c) Parity bit d) All of the above

11. What is the main advantage of Selective Repeat ARQ?

a) It retransmits only the lost or corrupted frames b) It is simple to implement c) It has low latency d) It requires less bandwidth

12. Which of the following is a characteristic of Go-Back-N ARQ?

a) It retransmits all frames after a lost frame b) It is more efficient than Stop-and-Wait ARQ c) It allows multiple frames to be in transit d) All of the above

13. What is the primary purpose of the Data Link Layer?

a) To provide reliable data transfer over a physical link b) To route data between networks c) To manage network congestion d) To encrypt data for secure transmission

14. Which of the following is a function of the Data Link Layer?

a) Framing b) Error detection c) Flow control d) All of the above

15. What is the main disadvantage of Go-Back-N ARQ?

a) It retransmits unnecessary frames b) It is complex to implement c) It has high latency d) It requires more bandwidth

Data Link Layer MCQs

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