PP Presentation
- Known as a “positive acknowledgement/retransmission protocal (par)” [Tanenbaum 89], or sometimes called “complete stop and wait”. This allows data to be transmitted in one direction (half duplex) over a noisy communication channel that garbles and loses frames.
- If frame m is lost of damaged, the receiver will not ack and the sender keeps trying.
- If the receiver gets the wrong seq number, it is rejected as a duplicate.