subject: computer networks

Why doesn't the receiver side of Go-Back-N need to keep a sliding window like we do for Selective Repeat? We actually do need to keep a sliding window for the receiver and the problem statement is wrong. Since any out of order packets will get retransmitted if there is an issue, the receiver only needs to keep track of the next in-order packet that we expect to receive. Since the receiver will buffer any out of order packets, we don't need a window to keep track of what was buffered Since the sender will only send one packet at a time, the receiver has nothing to keep a window for