Refer to the exhibit.
Which two statements are true about the required switch configurations to support a voice VLAN? (Choose two.)
A.
CDP must be disabled on the switch port to prevent interference between CDP messages
and voice traffic.
B.
Port security cannot be configured on a port that is configured for a voice vlan.
C.
Static secure MAC addresses should be configured on voice vlan ports to prevent access
by devices other than IP phones.
D.
CDP must be enabled on the switch port to allow configuration information to be passed
to the IP phone.
E.
Portfast must be enabled on the switch port.
F.
802.1x authentication cannot be configured on a port configured for a voice vlan.
Explanation:
CDP (Cisco Discovery Protocol) must be enabled on switch port connected to IP Phone to
recognize the IP Phone by switch and enable Port Fast to bring switch port directly from
blocking to forwarding state. The Port Fast feature is automatically enabled when voice
VLAN is configured. When you disable voice VLAN, the Port Fast feature is not automatically
disabled.