A Cisco engineer must configure a single switch interface to meet these requirements: - Accept untagged frames and place them in VLAN 20, - Accept tagged frames...

A Cisco engineer must configure a single switch interface to meet these requirements: - Accept untagged frames and place them in VLAN 20, - Accept tagged frames in VLAN 30 when CDP detects a Cisco IP phone. Which command set must the engineer apply?

A. switchport mode dynamic desirable switchport access vlan 20 switchport trunk allowed vlan 30 switchport voice vlan 30 B. switchport mode access switchport access vlan 20 switchport voice vlan 30 C. switchport mode dynamic auto switchport trunk native vlan 20 switchport trunk allowed vlan 30 switchport voice vlan 30 D. switchport mode trunk switchport access vlan 20 switchport voice vlan 30