A technician is configuring a switch to allow access both to IP phones and to PCs on interface Fa0/12. The technician enters the interface command mls qos trust cos . What is the reason for including that command? It is used to verify service levels and to ensure that congestion over serial interfaces is minimized for voice traffic. It is used to set the trusted state of an interface to allow classification of traffic for QoS based on the CoS value of the IP phone. It is used to provide higher categories of security for voice and video traffic. It is used in conjuction with STP PortFast to ensure that interface Fa0/12, in case of a shutdown, regains an "up" state immediately. Navigation Bar