Question

Consider the following statements about flow and error control :
A. Go-Back-N retransmits only the frame that is lost

B. Selective Repeat improves the bandwidth utilization over Go-Back-N

C. Parity bits can detect all single-bit errors

D. Stop and wait protocol achieves high channel utilization on long-delay networks

E. Cyclic Redundancy check provides stronger error detection than single parity

Choose the correct answer from the options given below :

• A. A, B, E only
• B. A, C, D only
• C. B, C, D only
• D. B, C, E only

Hint:

Go-Back-N = Retransmit $N$ frames. Selective Repeat = Retransmit only the 1 lost frame. CRC is the "gold standard" for error detection in networking.

Answer 1

The Correct Option is D