单项选择题

For which WMM queue is U-APSD most beneficial?（）

A.on any of the queues
B.AC_VO
C.AC_VI
D.the strict priority queue

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多项选择题

A.synchronization of the transmission and reception of voice frames
B.bandwidth reservation
C.optimized power-save mode periods
D.increased call capacity
E.priority bandwidth and polling

单项选择题

WhatistheCiscorecommendedEDCFqueuetouseforvoiceTSPEC?（）

A.AC_VI
B.AC_VO
C.AC_BK
D.AC_BE