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A Computer on a 10 Mbps network is regulated by a token bucket. The token bucket is filled at a rate of 2 Mbps. It is initially filled to capacity with 16 megabits. What is the maximum duration for which the computer can transmit at the full 10 Mbps?

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UGC NET Computer Science (Paper 2) 11 March 2023 Official Paper
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  1. 1.6 seconds
  2. 2 seconds
  3. 5 seconds
  4. 8 seconds

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Option 2 : 2 seconds
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UGC NET Paper 1: Held on 21st August 2024 Shift 1
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The correct answer is 2 seconds

SOLUTION:

The maximum duration for which the computer can transmit at the full 10 Mbps can be calculated using the concept of token bucket.

  • Token rate into bucket = 2 Mbps
  • Output rate of bucket = 10 Mbps
  • Effective rate = 10-2 = 8 Mbps
  • Bucket capacity is full, 16 Mb
  • So, at effective rate bucket will drain in 16/8 = 2s

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