What are four advantages that come from using auxiliary or voice VLANs in a Cisco Unified
Communications environment? (Choose four)

A.
Separates voice and data traffic

B.
Allows connectively between the voice and access VLANs

C.
Enables auto-registration

D.
Prevents unnecessary IP address renumbering

E.
Only a single physical port on the switch

F.
Simplifies QoS configuration