Question: A. (4 Points) Referring to the below figure: Consider 2 caching strategies at the local DNS: (a) Caching the TLD DNS servers' IP addresses vs.

A. (4 Points) Referring to the below figure: Consider 2 caching

A. (4 Points) Referring to the below figure: Consider 2 caching strategies at the local DNS: (a) Caching the TLD DNS servers' IP addresses vs. (b) Caching the previous hostname-IP answers. I. If the local DNS server implements just strategy (a), what is the delay the 2 nd time the requesting host querying the IP of www.amazon.com? II. Continue from (I). What is the delay querying www.microsoft.com next? III. If the local DNS server implements just strategy (b), what is the delay the 2nd time the requesting host querying the IP of www.amazon.com? IV. Continue from (III). What is the delay querying www.microsoft.com next? Suppose the requesting host queries often IP addresses of various something.com. Which caching strategy would you recommend? And Why

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