Which statement is a characteristic of multi-VLAN access ports?

A.
The port has to support STP PortFast.

B.
The auxiliary VLAN is for data service and is identified by the PVID.

C.
The port hardware is set as an 802.1Q trunk.

D.
The voice service and data service use the same trust boundary.

Explanation:
The integration of 802.1x and IP phones is based on the switch configuration of multi-VLAN
access ports. Multi-VLAN ports belong to two VLANs: native VLAN (PVID) and auxiliary VLAN
(VVID). This allows the separation of voice and data traffic and enables 802.1x authentication only
on the PVID.
Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/20ew/configuration/guide/voice.h
tml