单项选择题
A. technical support that requires an annual subscription
B. management consultancy service offered to develop partner business process
C. support for partners building a new business
D. program to develop Unified Communications practice
单项选择题 Whichstatementbestdescribesclusteringinasmall-businesswirelessnetwork？（）
多项选择题 Whichtwocomponentsareuniquetocontroller-basedwirelessinstallations？（）
单项选择题 IProutingprotocols，suchasOSPFandEnhancedEIGRP，areusedprimarilyinnetworkdesignsthatcontainentryandexitpointstothenetworkfromserviceproviders.WhatisacommontraitofIProutingprotocols？（）