C program for stop and wait protocol download#

Wikipedia is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. This is what is done in Go-Back-N ARQ and the Selective Repeat ARQ.īy using this site, you agree to the Terms of Use and Privacy Policy. To solve this problem, one can send more than one packet at a time with a larger sequence number and use one ACK for a set. In stop and wait protocol after assuming that the transmission time for the acknowledgement and the processing time at nodes are negligible, the time taken. The throughput on the channel is a fraction of what it could be. Similarly, if two subsequent ACKs reference the same sequence number, they are acknowledging the same frame. If two subsequent frames have the same sequence number, they are duplicates, and the second frame is discarded. This way, the receiver can detect duplicated frames by checking if the frame sequence numbers alternate. When the receiver sends an ACK, it includes the sequence number of the next packet it expects. This sequence number alternates (from 0 to 1) in subsequent frames. Although commonly distinguished from the sliding-window protocol, the stop-and-wait ARQ protocol is actually the simplest possible implementation of. A sliding window protocol is a feature of packet-based data transmission. The sender, waiting for a single ACK, receives two ACKs, which may cause problems if it assumes that the second ACK is for the next frame in the sequence. I enhanced my TFTP program by using a go back N protocol instead of stop and wait. In this case, the sender doesnt receive the ACK, times out, and sends the frame again.Įventually the receiver gets two copies of the same frame, and sends an ACK for each one.

If the receiver sees that the frame is damaged, the receiver discards it and does not send an ACKpretending that the frame was completely lost, not merely damaged. If the receiver sees that the frame is good, it sends an ACK. The receiver uses the redundancy check number to check for possible damage. ACK-1 requests the sender to send a data packet with sequence number-1.

C program for stop and wait protocol download#

However, real-life implementations vary to address certain issues of design. C Program For Stop And Wait Protocol Free Reader Application C Program For Stop And Wait Protocol Download Doc Ebook Generally, an eBook can be downloaded in five minutes or less. If the ACK does not reach the sender before a certain time, known as the timeout, the sender sends the same frame again.