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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 = 5 ms, tp = 3 ms, N = 15 is:

  1. 0.545
  2. 0.655
  3. 0.9375
  4. 0.961
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Asnwer: D

(tx)/(tx +(tp/N)) = (5)/(5+3/15) = 5/5.2 = .961

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Option d
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can you explain this ?
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Token Ring is not in syllabus
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but they can ask anything
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