Question : What is the purpose of bit stuffing in framing?
Solution :
Correct Answer : Prevent confusion with frame delimiters
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Question : Which statement correctly differentiates flow control and error control?
Solution :
Correct Answer : Flow control manages transmission rate, error control ensures accuracy
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Question : Which technique is commonly used in error control to ensure reliable transmission?
Solution :
Correct Answer : Automatic Repeat Request (ARQ)
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Question : In flow control, what is the main role of the receiver?
Solution :
Correct Answer : To regulate sender’s data rate
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Question : Which of the following best describes the primary purpose of framing in data link control?
Solution :
Correct Answer : To divide bit stream into identifiable units
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Question : What is the main purpose of adding redundant bits in error correction?
Solution :
Correct Answer : Detect and locate errors in transmitted data
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Question : In Hamming code, redundant bits are placed at positions:
Solution :
Correct Answer : Powers of 2
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Question : Which of the following statements about parity bits is correct?
Solution :
Correct Answer : A single parity bit can detect but not correct errors
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Question : What is the minimum number of redundant bits (r) required for d data bits in Hamming code?
Solution :
Correct Answer : 2ʳ ≥ d + r + 1
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Question : Which of the following correctly distinguishes Forward Error Correction (FEC) from Backward Error Correction?
Solution :
Correct Answer : FEC automatically corrects errors at receiver side
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Question : What is the primary purpose of adding redundant bits in error detection techniques?
Solution :
Correct Answer : To verify data integrity during transmission
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Question : Which of the following statements about Two-Dimensional Parity Check is correct?
Solution :
Correct Answer : It cannot detect errors if identical bit positions are corrupted in multiple rows
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Question : Which error detection method is considered most powerful for detecting burst and random errors?
Solution :
Correct Answer : Cyclic Redundancy Check (CRC)
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Question : In Checksum error detection, when is the received data considered valid?
Solution :
Correct Answer : When the complemented sum equals zero
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Question : Which of the following techniques can only detect single-bit errors and fails when two bits are altered?
Solution :
Correct Answer : Single Parity Check
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Question : In Data Link Layer communication, what is the role of error detection?
Solution :
Correct Answer : Identify errors in transmitted frames
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Question : Which of the following protocols operates at the Data Link Layer?
Solution :
Correct Answer : Ethernet
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Question : Which mechanism prevents the sender from overwhelming the receiver in the Data Link Layer?
Solution :
Correct Answer : Flow control
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Question : What is the main purpose of framing in the Data Link Layer?
Solution :
Correct Answer : Encapsulating network layer data into frames
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Question : Which of the following is the primary function of the Data Link Layer?
Solution :
Correct Answer : Reliable transmission between directly connected nodes
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