GATE | GATE 2017 MOCK II | Question 62

Consider the following two statements:

Statement 1: Stop and Wait protocol is preferred for LANs compared to WANs

Statement 2: Stop and Wait protocol is good for bursty data transmission.



Which of the above two statements are true?

(A) Only 1
(B) Only 2
(C) Both 1 and 2
(D) Neither 1 nor 2


Answer: (C)

Explanation: Efficiency of Stop and Wait is given by, E= 1/(1 +(2*d*B)/v*L), link speed(v) and Bandwith (B) are fixed . Thus only variable terms are packet length(L) and distance(d) Cleary, E decreases with increase in d . And E will increase with increase in L .
Hence Stop and Wait is suitable for LANs and bursty data.

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