Which four steps are needed to configure a voice VLAN on a switch port? (Choose four).

Question:
Which four steps are needed to configure a voice VLAN on a switch port? (Choose four).

• Configure the interface as an IEEE 802.1Q trunk.
• Assign the voice VLAN to the switch port.
• Activate spanning-tree PortFast on the interface.
• Ensure that voice traffic is trusted and tagged with a CoS priority value.
• Add a voice VLAN.
• Configure the switch port interface with subinterfaces.
• Assign a data VLAN to the switch port.
• Configure the switch port in access mode.

Explanation: To add an IP phone, the following commands should be added to the switch port:
SW3(config-vlan)# vlan 150
SW3(config-vlan)# name voice
SW3(config-vlan)# int fa0/20
SW3(config-if)# switchport mode access
SW3(config-if)# mls qos trust cos
SW3(config-if)# switchport access vlan 150

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