多项选择题
What are three features of voice traffic on a network？（）
A.bursty B.constant C.bandwidth intensive D.small packet sizes E.time-sensitive F.retransmittable
多项选择题 WhenanalogsignalsaredigitizedusingtheG.711codec，voicesamplesareencapsulatedintoprotocoldataunits（PDUs）involvingwhichthreeheaders？（）
单项选择题 WhichstatementistrueaboutthedistributedcallcontrolinaVoIPnetwork？（）
单项选择题 WhatisthepurposeoftheNBARprotocoldiscovery？（）
