In a sliding window ARQ scheme, the transmitter's window size is N and the receiver's window size is M. The minimum number of distinct sequence numbers required to ensure correct operation of the ARQ scheme is
- MN Answer given is M+N but my understanding is
According to the given question the communication between sender and receiver is unidirectional or bi directional?
If it is unidirectional then answer should be max (N,M) , as sender will send N frames and each frame should have unique sequence number and if it is bidirectional then it should be M+N as both will have their Frames In transition with unique sequence number.
Is my interpretation is correct? Please correct me if I am wrong!! If not why M+N is correct?