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| Q. |
In Go-Back-N window, when the timer of the packet times out, several packets have to be resent even some may have arrived safe. Whereas in Selective Repeat window, the sender resends |
| A. | packet which are not lost |
| B. | only those packets which are lost or corrupted |
| C. | packet from starting |
| D. | all the packets |
| Answer» B. only those packets which are lost or corrupted | |
| Explanation: in selective repeat, the sender side uses a searching algorithm to find the packets which need to be retransmitted based on the negative acknowledgements received and then resends only those packets thus saving bandwidth. | |
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