This video describes about pipelined protocol. Types of pipelined protocol. Explain about GobackN, Selective Repeat

"Pipelined Protocol:
Its a technique in which multiple requests are written out to a single socket without waiting for the corresponding responses (acknowledged).

• Range of sequence numbers must be increased.
• Data or Packet should be buffered at sender and/or receiver.

Two generic forms of pipelined protocols:
1. GobackN
2. Selective Repeat

Sender can have up to N unacked packets in pipeline.
Receiver only sends cumulative ACK. It doesn’t ACK packet if there’s a gap.
Sender has timer for oldest unacked packet.
Receiver keeps track of the sequence no. of the next frame it expects to receive, and sends that number with every ACK it sends.
Receiver will discard any frame that does not have the exact sequence number it expects.
Either a duplicate frame it already ACKed OR
An outoforder frame it expects to receive later
Receiver will resend an ACK for the last correct inorder frame.

GTU Computer Engineering (CE) Semester 4 2140709 Computer Networks Transport Layer Pipelined Protocol GobackN

Computer Networks PPTs are available here: http://www.darshan.ac.in/DIET/CE/GTU...

This video is recorded by Prof. Maulik Trivedi ([email protected], +919998265805) at Computer Engineering Department of Darshan Institute of Engineering & Technology, Rajkot as per GTU Syllabus.

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