多项选择题
What are three traffic descriptors that are used by the classification process to categorize packets that require special OoS handling？（）
A.Resource Reservation Protocol （RSVP） B.IP precedence C.traffic shaping D.trust boundaries E.DSCP F.application
单项选择题 Whatmanagementtoolcouldbeusedtoprovidecentralizedconfiguration，monitoring，andmanagementinanetworkbuiltonCiscowirelessLANcontrollersandLightweightAPs？（）
多项选择题 WhataretworeasonsforpacketlossonaVoIPconnection？（）
单项选择题 Whichstatementistrueaboutthecomponentsofaqueuingmechanism？（）
