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A link has a transmission speed of 500 × 106 bpsec. Assume acknowledgment has negligible transmission delay, and its one way propagation delay is 2 sec. Also assumes that the processing delays at nodes are also negligible. If data packet size is 107 bits, then the efficiency of Go-Back-7 protocol is _______ (in %)

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Tp = 2 sec

Tt = Packet Size / Bw
= 10^7 bits / 500 * 10^6 bits per sec
= 0.02 sec

Efficiency = W / 1+2a
= 7 / (1 + 2 * 2/0.02)
= 0.0348
= 0.0348 * 100
= 3.48%
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