What are two valid reasons for specifying DNS aliases? (Select two.)

A.
to ensure that the Enterprise Vault (EV) server can be joined to the Windows domain

B.
to simplify reconfiguration of the EV infrastructure

C.
to ensure that the EV server can be contacted from external domains

D.
to make it possible to use the EV built-in failover mechanisms

E.
to broadcast the EV server’s IP address to all clients on the network