Question: It's a question from computer networking course (Topic: DNS). Can anyone provide me with a full detialed answer? 10. [10 pts.] We wish to compare
It's a question from computer networking course (Topic: DNS).
Can anyone provide me with a full detialed answer?
10. [10 pts.] We wish to compare the response time to a DNS query in an institutional network that uses a local DNS server to that of an institutional network that doesn't. Assume that the local DNS server has a hit rate of 0.8. Also assume that the average round-trip delay within the institutional LAN is about TLAN 0.1 ms, and that the round-trip delay in the Internet is about Tint-1 s. a. What is the total DNS resolution delay, To, for the case of an institution that doesn't use a local DNS server? b. What is the total DNS resolution delay. Ti, for the case of an institution that uses a local DNS server? c. For what value of the ratio E1-TLAN/TInt does To and Ti come to within 10% of one another ie. the ratio 2 = T/T) = 0.9
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