Server A makes a DNS request to Server B to Suppose A, B, and C are DNS servers. determine the mapping of a domain name, say “hostname.someschool.edu", to an IP address. Server B does not have the mapping, but Server C does and Server B also has the IP address of Server C. What is the sequence of DNS requests and responses required for Server A to obtain the mapping assuming: (i) All DNS queries are recursive. (ii) All DNS queries are iterated.

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