多项选择题 VOIPisbeingimplementedinthenetworkandyouneedtoassesstheneedforQoS.WhichofthefollowingnetworkproblemswouldindicateaneedtoimplementQoSfeatures？（）

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

单项选择题 Based on the graphic below， which Catalyst switch interface command should be issued in orderfor the switch to instruct the phone to override the incoming CoS from the CK-PC before sendingthe packet to the switch？（）