A.Enable VTP pruning
B.From privileged mode ,erase the startup configuration file,then reload.
C.From privileged mode ,erase the vlan date file, then reload.
D.Cycle the switch power.

A.they run a spell check on host names to ensure accurate routing
B.they map individual hosts to their specific IP address
C.they convert domain names into IP address
D.Given an IP address，they determine the name of the host that is…