单项选择题
Which antenna generally has the narrowest first Fresnel zone in both the horizontal and verticalplanes？（）
A.omnidirectional
B.patch
C.Yagi
D.sector
E.parabolic dish
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相关考题
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多项选择题
WhichtwomethodscanbeusedtopreventorreduceRFIfromcolocateddirectionalantennas（）
A.Alternate polarization between colocated antennas
B.Cross-polarize antennas between endpoints
C.Install an RF-shielded box around the antennas
D.Increase the distance between the antennas -
单项选择题
Ciscorecommendsadecibelreferencedto1milliwattsignallevelforthecoveragecelledgeatthepredetermineddataratethatisneededtosupporttheVoWLANdeviceandcallcapacityrequirements.WhatisthatsignallevelvalueforCiscoUnifiedWirelessIPPhones7920，7921G，and7925G？（）
A.-65 dBm
B.-67 dBm
C.-69 dBm
D.-70 dBm -
多项选择题
WhichthreeformatscanbeusedtoimportfloormapsinCiscoWCSv5.2？（）
A.PNG
B.JPEG
C.GIF
D.BMP
E.PICT
F.TIFF
