Difference Between Go-Back-N and Selective Repeat Protocol

Both Go-Back-N and Selective Repeat protocols are sliding window protocols.

Following are the important differences between Go-Back-N and Selective Repeat Protocols.

Sr. No.	Key	Go-Back-N	Selective Repeat
1	Definition	In Go-Back-N if a sent frame is found suspected or damaged then all the frames are retransmitted till the last packet.	In Selective Repeat, only the suspected or damaged frames are retransmitted.
2	Sender Window Size	Sender Window is of size N.	Sender Window size is same as N.
3	Receiver Window Size	Receiver Window Size is 1.	Receiver Window Size is N.
4	Complexity	Go-Back-N is easier to implement.	In Selective Repeat, receiver window needs to sort the frames.
5	Efficiency	Efficiency of Go-Back-N = N / (1 + 2a).	Efficiency of Selective Repeat = N / (1 + 2a).
6	Acknowledgement	Acknowledgement type is cumulative.	Acknowledgement type is individual.

Published on 26-Nov-2019 10:53:33