ISRO | ISRO CS 2013 | Question 40
What will be the efficiency of a Stop and Wait protocol, if the transmission time for a frame is 20ns and the propagation time is 30ns?
(A)
20%
(B)
25%
(C)
40%
(D)
66%
Answer: (B)
Explanation:
Efficiency of stop and wait protocol = 1 / (1 + 2a) where, a = tpd / tx tpd = propagation delay tx = transmission delay
Efficiency = 1 / (1 + 2(30/20))
= 1/4 * 100
= 25 %
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Last Updated :
08 May, 2018
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