Question: A network administrator reads an article claiming that a good way to improve the performance of DNS is to make a slight modification to the

A network administrator reads an article claiming that a good way

A network administrator reads an article claiming that a good way to improve the performance of DNS is to make a slight modification to the client resolver. For a given name lookup, like looking up the A record of www.facebook.com, the suggestion is to have the client: Issue a recursive query to its local DNS server for the NS record of www.facebook.com. Send an iterative query to the authority listed in the NS record to get the A record. (i) Does this modification influence the caching performance of NS records at the local DNS server? If so, how? (ii) Does this modification influence the caching performance of A records at the local DNS server? If so, how? A network administrator reads an article claiming that a good way to improve the performance of DNS is to make a slight modification to the client resolver. For a given name lookup, like looking up the A record of www.facebook.com, the suggestion is to have the client: Issue a recursive query to its local DNS server for the NS record of www.facebook.com. Send an iterative query to the authority listed in the NS record to get the A record. (i) Does this modification influence the caching performance of NS records at the local DNS server? If so, how? (ii) Does this modification influence the caching performance of A records at the local DNS server? If so, how

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