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PRESENTATATION ON WIFI

PRESENTED BY:

RISHABH BARANWAL

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What is wi fi

Wi-fi suggests Wireless-Fidelity,compared with the long establishedaudio recording term High Fidelity or

Hi-Fi.Wi-Fi is simply a trademarkedterm meaning IEEE 802.11x.

is a mechanism for wirelessly

connecting electronic devices. Adevice enabled with Wi-Fi, such as apersonal computer, video game

console, smartphone, or digital audio

http://en.wikipedia.org/wiki/Smartphonehttp://en.wikipedia.org/wiki/Internethttp://en.wikipedia.org/wiki/Smartphone

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ORIGIN OF WIFI

The precursor to wi-fiwas inventedin1991 by NCR Corporation inNieuwegein,the Netherland.

Vic Hayes has been named as fatherof Wi-Fi

The first wireless products werebroughton the market under thename WaveLANwith speeds of 1Mbit/s to 2 Mbit/s

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HOW TO WIFI WORKS

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Conti..

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What a wireless network is

made up of Base stations, Access points, or

Gateways

The base station sends and receivesradio signals to and from theWi-Firadio in your laptop or PC, enablingyou to share your Internet

connection with other users on thenetwork. Access points and gatewayshave a wide range of features and

performance capabilities, but they all

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useses

To connect to a Wi-Fi LAN, a computerhas to be equipped with awireless network interface controller.

The combination of computer andinterface controller is called a station.

All stations share a

single radio frequencycommunication channel.

Transmissions on this channel arereceived by all stations within range.

The hardware does not si nal the

http://en.wikipedia.org/wiki/Wireless_network_interface_controllerhttp://en.wikipedia.org/wiki/Wireless_network_interface_controller

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A Wi-Fi-enabled device, such as apersonal computer, video gameconsole, smartphone or digital audio

player, can connect to the Internetwhen within range of awireless network connected to the

Internet. The coverage of one ormore (interconnected) access pointscalled hotspotscomprises an areaas small as a few rooms or as largeas man s uare miles. Covera e in

http://en.wikipedia.org/wiki/Personal_computerhttp://en.wikipedia.org/wiki/Wireless_networkhttp://en.wikipedia.org/wiki/Wireless_access_pointhttp://en.wikipedia.org/wiki/Wireless_access_pointhttp://en.wikipedia.org/wiki/Wireless_networkhttp://en.wikipedia.org/wiki/Personal_computer

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Cont.

Routers that incorporate adigital subscriber line modem or acable modem and a Wi-Fi access

point, often set up in homes andother buildings, provide Internetaccess and internetworking to all

devices tuned into them, wirelesslyor via cable. With the emergence ofMiFi and WiBro (a portable Wi-Firouter) people can easily create theirown Wi-Fi hots ots that connect to

http://en.wikipedia.org/wiki/Router_(computing)http://en.wikipedia.org/wiki/Digital_subscriber_linehttp://en.wikipedia.org/wiki/Cable_modemhttp://en.wikipedia.org/wiki/Internetworkinghttp://en.wikipedia.org/wiki/MiFihttp://en.wikipedia.org/wiki/WiBrohttp://en.wikipedia.org/wiki/WiBrohttp://en.wikipedia.org/wiki/MiFihttp://en.wikipedia.org/wiki/Internetworkinghttp://en.wikipedia.org/wiki/Cable_modemhttp://en.wikipedia.org/wiki/Digital_subscriber_linehttp://en.wikipedia.org/wiki/Router_(computing)

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Kind of wi fi

City wide wi fi:

In the early 2000s, many cities

around the world announced plans toconstruct city-wide Wi-Fi networks.Doing so proved to be more difficultthan envisioned, and as a result most

of these projects were eithercancelled or placed on indefinitehold. A few were successful.

In 2010 Mysore became India's first

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Campus wide wi fi

Carnegie Mellon University built thefirst wireless Internet network at itsPittsburgh campus in 1994 before Wi-

Fi branding originated.[11] Manytraditional college campuses provideat least partial wireless Wi-Fi Internet

coverage.

In 2000, Drexel University in

Philadelphia became the United

http://en.wikipedia.org/wiki/Carnegie_Mellon_Universityhttp://en.wikipedia.org/wiki/Pittsburghhttp://en.wikipedia.org/wiki/Drexel_Universityhttp://en.wikipedia.org/wiki/Drexel_Universityhttp://en.wikipedia.org/wiki/Pittsburghhttp://en.wikipedia.org/wiki/Carnegie_Mellon_University

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advantages

Wi-Fi allows cheaper deployment oflocal area networks (LANs). Alsospaces where cables cannot be run,

such as outdoor areas and historicalbuildings, can host wireless LANs.

Wi-Fi operates in more than 220,000

http://en.wikipedia.org/wiki/Local_area_networkhttp://en.wikipedia.org/wiki/Local_area_network

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limitation

o Spectrum assignments andoperational limitations are notconsistent worldwide: most of Europe

allows for an additional two channelsbeyond those permitted in the U.S.for the 2.4 GHz band (113 vs. 1

11), while Japan has one more on topof that (114). Europe, as of 2007was essentially homogeneous in thisrespect.

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VERY VERY THANK YOU