GATE | Gate IT 2007 | Question 72
Consider a token ring topology with N stations (numbered 1 to N) running token ring protocol where the stations are equally spaced. When a station gets the token it is allowed to send one frame of fixed size. Ring latency is tp, while the transmission time of a frame is tt. All other latencies can be neglected.
The maximum utilization of the token ring when tt =3 ms, tp = 5 ms, N = 10 is
Explanation: Maximum efficiency of token ring = (tt)/(tt +( tp/n))
tt= 3 ms
tp =5 ms and n=10,
efficiency = 3/(3+.5)= .857
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