In the Go-Back-N ARQ protocol, explain what happens if one of the transmitted frames is lost during transmission or arrives at the receiver with an error.
What will be an ideal response?
If one of the transmitted frames is lost during transmission or arrives at the receiver with an error, then receiver will be faced with an out of sequence frame. At this time, the receiver will send a negative acknowledgement message (the “Rej” frame), request the sender to resend the corrupted or lost frame, and discard all frames that it received subsequently until it will receive a frame with expected sequence number.
Upon receipt of a Rej frame from the receiver, the sender will “go back” to the sequence frame starting with the corrupted or lost frame and retransmit the requested frame and all successive frames.
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