illustration download icon wi fi
|illustration download icon wi fi|
Wi-Fi (/ˈwaɪfaɪ/, also written Wifi or WiFi)
A Wi-Fi-capable tool (such as a personal computer, video game console, smart telephone, tablet, or digital audio player) is capable of connecting to a network source like the Internet via a wireless network access point. An access point (or hotspot) like that carries a range of approximately 20 mtr. (65 feet) indoors and more spacious outdoors. Hotspot coverage is capable of covering an area the size of a room with walls blocking radio waves or more than a square mile — it's capable of working on more than one overlapping access point.
"Wi-Fi" is a trademark of the Wi-Fi Alliance and the brand name for products that wear the IEEE 802.11 standard family. Only Wi-Fi products that complete the Wi-Fi Alliance interoperability test can wear the "Wi-Fi CERTIFIED" name and trademark.
Wi-Fi brings fickle security events. Its first encryption system, WEP, proved to be lightly penetrated. Even higher quality protocols, WPA and WPA2, are then added. However, an optional feature added in 2007 called Wi-Fi Protected Setup (WPS), has a loophole that it is highly likely that an attacker getting a WPA password or WPA2 router came from remotely in just over an hour. A number of companies have suggested turning off the WPS feature. The Wi-Fi Alliance has since updated its testing concept and certification program to cover all newly certified equipment immune from a violent AP PIN attack.
The term Wi-Fi, first used commercially in August 1999, was insaned by a brand consulting firm called Interbrand Corporation. The Wi-Fi Alliance employs Interbrand to select a name that is "lighter spoken than 'IEEE 802.11b Direct Sequence'". Belanger also said that Interbrand created Wi-Fi as a pun derived from Hi-Fi (high fidelity); they also designed the Wi-Fi logo.