Cvoice question 58

Which protocol is used to inform the IP phone of its voice VLAN ID?
A. Cisco keepalives
B. Cisco Discovery Protocol
C. Cisco Spanning Tree Protocol
D. Cisco VLAN Discovery Protocol

Answer: B
Explanation
Cisco IP phones will be able to receive voice VLAN configuration via CDP. Once it has received the voice VLAN idr, the IP phone will begin tagging its own packets. Non-Cisco IP phones will not be able to understand CDP packets.