单项选择题
A.omnidirectional
B.patch
C.Yagi
D.sector
E.parabolic dish
多项选择题 WhichtwomethodscanbeusedtopreventorreduceRFIfromcolocateddirectionalantennas（）
单项选择题 Ciscorecommendsadecibelreferencedto1milliwattsignallevelforthecoveragecelledgeatthepredetermineddataratethatisneededtosupporttheVoWLANdeviceandcallcapacityrequirements.WhatisthatsignallevelvalueforCiscoUnifiedWirelessIPPhones7920，7921G，and7925G？（）
多项选择题 WhichthreeformatscanbeusedtoimportfloormapsinCiscoWCSv5.2？（）