单项选择题 Whichofthecharacteristicsbelowisassociatedwiththe（QoS）IntegratedServicesModel？（）

多项选择题 The Company is rolling out Cisco’s Architecture for Voice， Video and Integrated Data （AVVID）.   Which of the following choices represent the fundamental intelligent network services in Cisco’s  AVVID？ （）

单项选择题 Refer to the exhibit.  What is the effect when the switchport priority extend cos 3 command is  configured on the switch port interface connected to the IP phone？（）