According to the following statement， can you tell me which term is described？（）
It is the air return for an air conditioned system. In most buildings， the area above a drop ceiling orunder a raised floor is used as the air return （source of air） for the air conditioning. Those drop
ceiling and raised floors are also where wire is often installed. If wire and cable is installed in a dropceiling or raised floor， it is out of sight. If that cable were burning， it would give off toxic fumes.These would be fed to the rest of the building by the air conditioner. As a result， people could beinjured even though they are a long way from the fire.
A.DAS area
B.plenum area
C.extended area
D.RF special area
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A.show {802.11a 802.11b} 2roam statistics
B.show client roam-history
C.show client tsm 802.11a/b/g
D.show client detail
E.show client ap-roam-history
A.average signal strength that is greater than -67 dBi
B.cell overlap of 15 to 20 percent
C.uneven wireless coverage
D.absence of coverage holes
A.more access points than a data network
B.fewer access points than a data network
C.less SNR than a data network
D.specific relative access point placement
A.omnidirectional
B.patch
C.Yagi
D.sector
E.parabolic dish
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
最新試題
What is the minimum recommended access point overlap for voice roaming？（）
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？（）
Which two methods can be used to prevent or reduce RFI from colocated directional antennas（）
How should the transmit power on an access point and client each be set during a site survey？（）
Which format can NOT be imported into Cisco WCS Planning Tool？（）
By how much is a signal’s strength reduced when the signal passes through an object thatintroduces 3 dB of attenuation？（）
When conducting a wireless voice site survey， which two sizing considerations exist for thecoverage cell？（）
What does a broad-spectrum interferer lower？（）
In an outdoor bridge link， what is calculated by using this formula： transmitter power + antennagain - insertion OR cable loss（）？
How is attenuation measured？（）