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 dropceiling 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.

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？（）

When planning for voice deployments with the Cisco Unified Wireless IP Phone 7921G handset in amultifloor building with a WLAN that operates at an 11 MB/s data rate， how many decibelsreferenced to 1 milliwatt of same-channel separation are recommended between floors？（）

How is attenuation measured？（）

Which antenna generally has the narrowest first Fresnel zone in both the horizontal and verticalplanes？（）

What should be done if Cisco Spectrum Expert Wi-Fi reports a channel utilization of 40 percent onchannel 36， from a source outside of the site？（）

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

What is a site survey best practice for location-based services？（）

Given the correct input parameters， the Cisco WCS Planning Tool can calculate a recommendedaccess point count for which three uses？ （）

Which statement regarding the site-survey process is correct？（）