多项选择题
Which two options can be used as traffic descriptors when classifying and marking traffic？ （）
A.incoming interface B.Layer 2 differentiated services code point （DSCP） C.Layer 3 IP precedence D.outgoing interface
单项选择题 What will the H.323 gateways do when they receive a call request?（）
多项选择题 WhichtwostatementsabouttheimplementationofWLANQoSaretrue？（）
多项选择题 WhatarethreetrafficdescriptorsthatareusedbytheclassificationprocesstocategorizepacketsthatrequirespecialOoShandling？（）
