Stop-and-Wait Protocol

What do you mean by Stop-and-Wait Protocol? Also describe Stop-and-Wait Automatic Repeat Request?

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In Stop and wait protocol, the sender sends one frame, waits till it receives the confirmation from receiver (okay to go ahead) and then sends the next frame.

Error correction in the Stop-and-Wait ARQ is done by keeping the copy of sent frame and retransmitting of frame if the timer expires.

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