It is known that the RTT between the client and the local DNS server is 20 ms,

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It is known that the RTT between the client and the local DNS server is 20 ms, while the RTT is between One DNS server with another DNS server is 60 ms. It assumes that there is no caching yet. What is the total response time in the scenario 1 and 2

scenario 1

scenario 2

If now the DNS record requested by the client has been cached by the local DNS server. What is the total response time for the two scenarios above?

Related Book For answer-question

Principles Of Information Security

ISBN: 9780357506431

7th Edition

Authors: Michael E. Whitman, Herbert J. Mattord

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Posted Date: Sep 11, 2023 03:42 AM

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It is known that the RTT between the client and the local DNS server is 20 ms,

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Step 1 In fig 1 If NO Caching yet scenario 1 RTT between the client and the local DNS servers is 20m... View the full answer

Principles Of Information Security

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