Discussion
In which ARQ, when a NAK is received, all frame sent since the last frame acknowledged an retransmitted
Answer: B
Correct answer: go-back-n
In go-back-N the receiver discards everything after the damaged frame, so the sender must retransmit that frame and all those sent after it. Selective reject retransmits only the damaged one, at the cost of buffering at the receiver.
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