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A Stop-and-Wait protocol runs on a 1 Mbps link with 1000-bit frames and a one-way propagation delay of 20 ms (ACK size is negligible). What…

953Medium DSSSB TGT Computer Science 0 replies 1 views

A Stop-and-Wait protocol runs on a 1 Mbps link with 1000-bit frames and a one-way propagation delay of 20 ms (ACK size is negligible). What is the link utilisation?

A1/40
B1/41
C1/21
D1/81

Correct answer: B

Explanation

Transmission time = 1 ms and round trip = 40 ms, so utilisation = 1/(1 + 40) = 1/41.

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