A wireless LAN (WLAN) supports mobile clients connecting to the enterprise network. The mobile clients do not have a physical connection to the network because WLANs replace the Layer 1 traditional wired network (usually Category 5 cable) with radio frequency (RF)
transmissions through the air. WLANs are for local networks, either in-building, line-of-sight outdoor bridging applications, or a combination of both.
In a wireless network, many issues can arise to prevent the RF signal from reaching all parts of the facility, including multipath distortion, hidden node problems, interference from other wireless sources, and near/far issues. A site survey helps find the regions where these issues occur by defining the contours of RF coverage in a particular facility, discovering regions where multipath distortion can occur, areas where RF interference is high, and finding solutions to eliminate such issues.
Privacy and security issues must also be considered in a wireless network. Because WLANs are typically connected to the wired network, all the modules within the enterprise infrastructure must be considered to ensure the success of a wireless deployment.
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