1.

A channel has a bit rate of 4 kbps and one-way propagation delay of 20 ms. The channel uses stop and wait protocol. The transmission time of the acknowledgement frame is negligible. To get a channel efficiency of at least 50%, the minimum frame size should be

A. 80 bytes
B. 80 bits
C. 160 bytes
D. 160 bits
Answer» E.


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