Wi-Fi (or wireless) is a local wireless network area of the computer that allows electronic devices network technology, mainly by the 2.4 gigahertz UHF (12 cm) and 5 GHz radio bands ISM (6 cm) SHF.
The Wi-Fi Alliance defines Wi-Fi as any "wireless LAN" (WLAN) product based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards. " However, the term "Wi-Fi" is used in general English as a synonym for "WLAN" since most modern wireless LANs are based on these standards. "Wi-Fi" is a trademark of the Wi-Fi Alliance. The "Wi-Fi CERTIFIED" brand can be used by Wi-Fi products that successfully complete interoperability certification testing Wi-Fi Alliance.
Many devices can use Wi-Fi, such as personal computers, video game consoles, smartphones, digital cameras, tablet computers and digital audio players. They can connect to a network resource such as the Internet via a wireless access point. Such an access point (or hotspot) has a range of about 20 meters (66 feet) inside and more outside range. Hotspot coverage can comprise an area as small as a single room with walls that block radio waves, or as large as many square kilometers obtained using multiple access points that overlap.
Representation of a wireless transmitting device information to another device, both connected to the LAN, to print a document. Wi-Fi can be less secure than wired connections, such as Ethernet, because an intruder does not need a physical connection. Web pages that use TLS are secure, but in clear internet access can be easily detected by intruders. For this reason, Wi-Fi has adopted various encryption technologies.
The beginning WEP proved easy to break. Higher quality protocols (WPA, WPA2) were added later. Added option in 2007, called Wi-Fi Protected Setup (WPS), had a serious flaw that allowed an attacker to recover the router password. The Wi-Fi Alliance has since updated its test and certification plan to ensure that all new certified devices withstand attacks. Now check latest wi-fi name is Li-Fi.