UGC-NET | UGC NET CS 2016 July – III | Question 27

A pure ALOHA Network transmits 200 bit frames using a shared channel with 200 Kbps bandwidth. If the system (all stations put together) produces 500 frames per second, then the throughput of the system is ______.
(A) 0.384
(B) 0.184
(C) 0.286
(D) 0.586


Answer: (B)

Explanation: Throughput(S) in pure aloha is G * e^-2G:
It is maximum when G = 1 / 2.
i.e. S = 1 / 2 * (2.71)^{-2 * 1 / 2} =1 / 2 * (2.71)^-1 = 0.184.
So, option (B) is correct.

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