Sep 13, 2020
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Wi-Fi (/ˈwaɪfaɪ/, also written Wifi or WiFi)
is a technology that uses electronic equipment to exchange information wirelessly (using radio waves) over a computer network, as well as a high-speed Internet connection. The Wi-Fi Alliance defines Wi-Fi as "any wireless local area network (WLAN) product based on the Institute of Electrical plus Electronics Engineers (IEEE) 802.11 standard". However, since today's WLAN is usually based on these standards, the meaning of "Wi-Fi" is used in English as a synonym for "WLAN".
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.
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.
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Name
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.
Wi-Fi Alliance resulted in the original advertising slogan "The Standard for Wireless Fidelity" and briefly used it while after the Wi-Fi brand was created. Because of the slogan, people do not correctly think that Wi-Fi stands for "Wireless Fidelity" even though it is not.
The yin-yang Wi-Fi logo is a sign of certification of the interoperability of a product.
The non-Wi-Fi technology needed for point-titk has always been like Motorola Canopy is usually called fixed wireless. Alternative wireless technologies include handheld telephone standards such as 2G, 3G, or 4G.
Use
To connect to Wi-Fi LAN, a computer must be equipped with a wireless network interface controller. The combined computer and controller interface is called a station. All stations share one radio frequency communication channel. Transmissions on this channel are received by all stations within range. The hardware does not tell the user that the transmission was successfully received and this is called the best delivery mechanism. A transportwave is used to send information in the form of a package, called an "Ethernet frame". Each station continues to connect with radio frequency communication channels to confiscate available transmissions.
Internet Access
A Wi-Fi device is capable of connecting to the Internet when within range of a wireless network connected to the Internet. Coverage of one or more access points (interconnection) — called hotspots — is capable of covering an area of more than one room to more than one square mile. Coverage in the wider region needs more than one access point with overlapping coverage. The prevalent outdoor Wi-Fi technology was successfully implemented in wireless mesh networks in London, United Kingdom.
Wi-Fi is available in private homes, high streets and shops, as well as public spaces via free or paid Wi-Fi hotspots. Organizations and businesses, like airports, hotels and restaurants, are usually free hotspots to attract visitors. Enthusiastic users or authorities who want to provide services or over-promote business in special places sometimes have free Wi-Fi access.
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Routers involving digital customer street modems or cable modems and WI-Fi access points, usually installed in homes and other buildings, provide Internet and internetwork access to all equipment connected to the router wirelessly or wiredly. With the advent of MiFi and WiBro (portable Wi-Fi routers), users are able to lightly result in their own Wi-Fi hotspots connected to the Internet over mobile networks. Now, Android, Bada, iOS (iPhone) and Symbian equipment are capable of creating wireless connections. Wi-Fi also connects places that don't usually have network access, such as kitchens and garden houses.
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