Wifi Stand for ? - What is Wifi

Wi-Fi networks have no physical wired connection between sender and receiver by using radio frequency. Wi-Fi is simply a trademarked term meaning IEEE 802.11x. WiFi stands for Wireless Fidelity and is the same thing as saying WLAN which stands for "Wireless Local Area Network. WiFi works off of the same principle as other wireless devices - it uses radio frequencies to send signals between devices. For example, your car stereo receives frequencies in Kilohertz and Megahertz range (AM and FM stations), and WiFi transmits and receives data in the Gigahertz range.
For WiFi, this frequency happens to be 2.4Ghz and 5Ghz. These waves are very similar to the frequency found in your microwave! Your microwave uses 2.450Ghz to heat up food and your router uses 2.412 GHz to 2.472 GHz to transmit your data over WiFi.