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There is an example in web caching section 2.2.5 in the book "computer networking a top down approach".Can anyone explain me the example? How average delay became 0.4*0.01 + 0.6*2.01?

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It's a weighted average of 40% requests with .01 s and 60% requests with 2.01 s response time.

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  • Does it mean that each request at cache has a delay of 0.01 seconds and each request at server has a delay of 2.01 seconds? Sep 24, 2017 at 16:27
  • Yes. The text is quite explicit on that.
    – Zac67
    Sep 24, 2017 at 16:31

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