g When a host within the msudenver. edu domain needs to visit a webserver within the domain, the host needs to contact the within thedomain to resolve the ip address of the webserver. (b)When a webserver within the domain changesits ip address, the within thedomain needs to be notified to update its database.(c)When an authoritative DNS server within the domain changes its ip address, the in charge of thedomain needs to be notified to update its database.(d)If recursive queryis implemented on a local DNS server, when this local DNS server does not have the ip address it needs to resolve in its cache, it needs to contact a(n) FIRST, and EVENTUALLY, gets such ip address from a(n).(e)If iteratedqueryis implemented on a local DNS server, when this local DNS server does not have the ip address it needs to resolve in its cache, it needs to contact a(n) FIRST, and EVENTUALLY, gets such ip address from a(n).