多项选择题
A.involution
B.encoding
C.sampling
D.quantization
E.compression
F.companding
多项选择题 WhattwostepsneedtobetakenindeployingAutoQoSforenterpriseonrouters？（）
单项选择题 AbranchofficeofAcmeInsurancehas15IPphonesconnectedtothemainofficeusingthedistributedcallprocessingmodel.Normally，thephonesworkwithgreatquality.However，duringverybusytimeswhenalloftheagentsareonthephoneatthesametime，thevoicequalitydropsprecipitously.Wordsorphrasesorbotharedroppedfromconversations.Whatisthemostlikelycauseoftheproblem？（）
多项选择题 WhichtwoQoSstatementsaretrueabouttheuseoftheSDMQoSwizard？（）