单项选择题
A stream of voice packets transmitted over a WAN network encounters differing queuing delays. One router in the path used by the voice packets delays some of the packets for 4 ms while transmitting a large video file， but delays other packets only 2 ms. Another router delays some packets 5 ms， but transmits others in 2 ms. How would you best describe this type of problem？（）
A.end-to-end delay B.interference from bulk data traffic C.processing delays D.serialization delays E.jitter
多项选择题 WhataretwofeaturesofWCSwirelessmanagement？（）
单项选择题 WhichstatementistrueabouttheSDMQoSwizardanditsabilitytoenableaQoSpolicyonrouterinterfaces？（）
多项选择题 Whichtwoqueuingmethodswillallowapercentageoftheavailablebandwidthtobeallocatedtoeachqueue？（）
