#4 Assume that the RTT between a client and the local DNS server is RTT_l, while the RTT between the local DNS server and other DNS servers is RTT_r. Assume that no DNS server performs caching. a. What is the total response time for the scenario illustrated in Figure (i)? b. What is the total response time for the scenario illustrated in Figure (ii)? c. Assume now that the DNS record for the requested name is cached at the local DNS server. What is the total response time for the two scenarios?
Added by April R.
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### Scenario (i): Client -> Local DNS Server -> Other DNS Servers #### Show more…
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