WIFI: Wireless Fidelity
WIFI also Spelled as Wi-Fi is a local area wireless technology. It allows an electronic device to transfer data or connect to the internet using ISM radio bands. It is an underlying technology of wireless local area network (WLAN). Wi-Fi allows computers and other devices to communicate over a wireless network.
Wi-Fi network components are based on the one of the 802.11 standards developed by the IEEE and adopted by Wi-Fi alliance. It provides a standard way to connect with wireless network. Wi-Fi is the trademark of the Wi-Fi alliance and used as a brand name for products using the IEEE 802.11 standards.
Wi-Fi can be used on several types of devices like personal computers, video game console, smart phones, digital camera, tablet computers etc. You can use Wi-Fi to create a hotspot within the range of 20 meters (66 feet). It is less secure than wired connection because the intruder does not need the physical connection to use the Wi-Fi.
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Wi-Fi is based on IEEE 802.11 specifications. This is a list of Wi-Fi standards in chronological order.
A wireless accessing point 802.11b or 802.11g provides range of 120 ft indoor and 300 feet outdoor access of internet through computers, laptops, smart phones etc.