The main advantage of stop & wait protocols is their accuracy. The working of Stop and Wait Protocol is shown in the figure below − The flow control method will check that the senders send the data only at a rate that the receiver can receive and process. The Flow-control methods will help in ensuring that the data doesn't get lost. If the sender is transmitting the data at a rate higher than the receiver can receive and process it, the data will get lost. While sending the data from the sender to the receiver, the data flow needs to be controlled. When the sender gets the acknowledgement (ACK), it will send the next data packet to the receiver and wait for the disclosure again, and this process will continue as long as the sender has the data to send. the time joining message transmitting and acknowledgement receiving) is the sender’s waiting time, and the sender is idle during this time.

The sender will stop and wait for the acknowledgement from the receiver. In this, the sender will transmit one frame at a time to the receiver.

C program for stop and wait protocol