How It Works

• Sender input: file = p1, …, pn.

• S sends (p1,FST,0), (p2,INC,1), …,  (pn-1,INC,1), (pn,OK,0).

• R sends: ack, …, ack.

• S retransmits pi if timeout.

• Receiver recives: p1, …, pn.

• Sender and Receiver receives NOK or OK.

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