Let’s say we have five packets
p1 p2 p3 p4 p5
to be sent sequentially:
and for some reasons, p3 got delayed so it the the last packet to arrive recevier.
so below is the receiving order on the receiver’s end
p1 p2 p4 p5 p3
and according to the Go-Back-N Protocol, the receiver will only send acknowledge of
p2 when it receive
then the receiver receives
p3 right after
p5, and then it sends acknowledge of
p3 to the sender.
But there will still be a timeout and the sender still has to re-send
p5,even though the receiver did receive all packets, isn’t this Go-Back-N Protocol really inefficient?