Implementing and Operating Cisco Collaboration Core Technologies (CLCOR) — Question 227

On a Cisco Catalyst Switch, which command is required to send CDP packets on a switch port that configures a Cisco IP phone to transmit voice traffic in 802.1Q frames, tagged with the voice VLAN ID 221?

Answer options

• A. Device(config-if)# switchport trunk allowed vlan 221
• B. Device(config-if)# switchport vlan voice 221
• C. Device(config-if)# switchport voice vlan 221
• D. Device(config-if)# switchport access vlan 221

Correct answer: C

Explanation

The correct command is 'Device(config-if)# switchport voice vlan 221', which specifically configures the port to carry voice traffic with the designated VLAN ID. Option A is incorrect because it pertains to trunking rather than voice configuration, while option B is not a valid command and option D sets the access VLAN instead of the voice VLAN.