Wireless LAN (WLAN) technology provides internet access within a building or a limited outdoor area.
Wireless metropolitan area networks have been installed in cities worldwide to provide access for people outside an office or home network..
Wireless personal area networks cover a very limited area -- typically a maximum of 100 meters for most applications -- using protocols like Bluetooth and Zigbee.
Wireless WANs use cellular technology to provide access outside the range of a wireless LAN or metropolitan network.
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