200-301: Cisco Certified Network AssociateDemo

On a Cisco switch port connected to an IP phone, switchport priority extend trust preserves the incoming IEEE 802.1p/CoS priority of data traffic arriving from the phone’s access port instead of assigning a new value. Cisco documentation defines switchport priority extend {cos value | trust} as the setting that controls the priority of data traffic received from the Cisco IP Phone access port; the trust option keeps the received priority, while a numeric cos value overrides it. The switchport voice vlan ... commands configure voice VLAN handling, not preservation of data-packet priority.