Wi-Fi
Wi-Fi (short for wireless fidelity) is a category of networks that use radio signals instead of wires to connect computers and other devices. Another name for Wi-Fi is wireless Ethernet, because Wi-Fi uses many of the same data-handling rules and specifications as a wired Ethernet network. However, every Wi-Fi packet must include additional handshaking data, so the overall data transfer speed is often slower than a conventional Ethernet link.
Wi-Fi offers several advantages: It doesn't need cables to connect every network node, so it's often easier to install and use than a wired network connection. Rather than string cables through walls and provide a network outlet at every desk, you can distribute access to the network through antennas ...
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