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

Question

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

Quizplus · Accepted Answer

In Selective Repeat ARQ, the sender resends only those packets which are lost or corrupted, unlike Go-Back-N ARQ, where a larger set of packets might be resent due to a single packet loss. This makes Selective Repeat more efficient in terms of bandwidth usage, as it minimizes the number of retransmissions by only targeting the problematic packets.

In Go-Back-N Window, When the Timer of the Packet Times