The solution to this problem is to allow B to place the sequence number it is acknowledging in the acknowledgement frame
The solution to this problem is to allow B to place the sequence number it is acknowledging in the acknowledgement frame
Here A cannot confuse which packet is being acknowledged and will therefore stay in synch with B
We will now drop the assumption that data traffic is simplex, and look at protocols which allow flow controlled full-duplex communication over non-error free channels