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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多项选择题

Which two methods can be used to prevent or reduce RFI from colocated directional antennas（）

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

Cisco recommends a decibel referenced to 1 milliwatt signal level for the coverage cell edge at thepredetermined data rate that is needed to support the VoWLAN device and call capacityrequirements. What is that signal level value for Cisco Unified Wireless IP Phones 7920， 7921G， and7925G？（）

A.-65 dBm
B.-67 dBm
C.-69 dBm
D.-70 dBm

多项选择题

Which three formats can be used to import floor maps in Cisco WCS v5.2？（）

A.PNG
B.JPEG
C.GIF
D.BMP
E.PICT
F.TIFF