Wireless networks communicate using electromagnetic waves transmitted through antennas without physical connections like wires. They have advantages over wired networks such as quick installation, mobility, and lower maintenance costs. There are different types of wireless networks including WPAN for personal networks covering short distances, WLAN for local networks, WMAN for metropolitan networks, and WWAN for wide area networks. Key wireless technologies discussed include Bluetooth, WiMax, and protocols for mobile phones.
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