Multiple choice

Calculate the throughput for stop-and-wait flow control mechanism if the frame size is 4800 bits, bit rate is 9600 bps, distance between the devices is 2000 km and speed of propagation over the transmission is 200,000 km/s.

  1. 89%

  2. 96%

  3. 50%

  4. 100%

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tf = Transmission time required to transmit a frame Tp = Propagation time required to reach the destination for a transmitted bit Let A be a sender. Tf = Frame size/Bit rate = 4800/9600 = 0.5 sec Tp = 2000/200000 = 0.01 sec We know A = Tp/Tf A = 0.01/0.5 = 0.02 Throughput = 1/(1 + 2A) = 1/(1 + 2 x 0.02) = 0.96, i.e. 96%

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