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Wi-Fi: Prepared By: Jehad Shakr Supervised By: Jeehan M.A.S Dosky

Wi-Fi is a family of wireless network protocols based on IEEE 802.11 standards that allow nearby digital devices to exchange data using radio waves. These are the most widely used computer networks globally, used to connect devices like computers, tablets, smartphones, and smart home devices to wireless routers and each other, as well as to provide public internet access. The Wi-Fi Alliance tests and certifies devices for compliance with standards to ensure interoperability and backward compatibility between devices using over 800 member companies. Equipment can support multiple Wi-Fi versions which differ in radio bands, bandwidth, data rates, and other details to communicate with each other.

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56 views7 pages

Wi-Fi: Prepared By: Jehad Shakr Supervised By: Jeehan M.A.S Dosky

Wi-Fi is a family of wireless network protocols based on IEEE 802.11 standards that allow nearby digital devices to exchange data using radio waves. These are the most widely used computer networks globally, used to connect devices like computers, tablets, smartphones, and smart home devices to wireless routers and each other, as well as to provide public internet access. The Wi-Fi Alliance tests and certifies devices for compliance with standards to ensure interoperability and backward compatibility between devices using over 800 member companies. Equipment can support multiple Wi-Fi versions which differ in radio bands, bandwidth, data rates, and other details to communicate with each other.

Uploaded by

Hiwa Jalal
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Wi-Fi

Prepared by: Supervised by:


Jehad Shakr Jeehan M.A.S Dosky
Wi-Fi is a family of wireless network
protocols, based on the IEEE 802.11 family
of standards, which are commonly used
for local area networking of devices and
Internet access, allowing nearby digital
devices to exchange data by radio waves.
These are the most widely used computer
networks in the world, used globally in
home and small office networks to link
desktop and laptop computers, tablet
computers, smartphones, smart TVs,
printers, and smart speakers together and
to a wireless router to connect them to
the Internet, and in wireless access points
in public places like coffee shops, hotels,
libraries and airports to provide the public
Internet access for mobile devices.
History of Wi-Fi
A 1985 ruling by the U.S. Federal
Communications Commission released
parts of the ISM bands for unlicensed use
for communications. These frequency
bands include the same 2.4 GHz bands
used by equipment such as microwave
ovens and are thus subject to
interference.

A Prototype Test Bed for a wireless local


area network was developed in 1992 by
researchers from the Radiophysics
Division of CSIRO in Australia.

About the same time in The Netherlands


in 1991, the NCR Corporation with AT&T
Corporation invented the precursor to
802.11, intended for use in cashier
systems, under the name WaveLAN.
Etymology and terminology
The name Wi-Fi, commercially used at
least as early as August 1999, was coined
by the brand-consulting firm Interbrand.
The Wi-Fi Alliance had hired Interbrand to
create a name that was "a little catchier
than 'IEEE 802.11b Direct Sequence'. Phil
Belanger, a founding member of the Wi-Fi
Alliance, has stated that the term Wi-Fi
was chosen from a list of ten potential
names invented by Interbrand.
Certification
The IEEE does not test equipment for
compliance with their standards. The non-
profit Wi-Fi Alliance was formed in 1999
to fill this void—to establish and enforce
standards for interoperability and
backward compatibility, and to promote
wireless local-area-network technology.
As of 2017, the Wi-Fi Alliance includes
more than 800 companies. It includes
3Com (now owned by HPE/Hewlett-
Packard Enterprise), Aironet (now owned
by Cisco), Harris Semiconductor (now
owned by Intersil), Lucent (now owned by
Nokia), Nokia and Symbol Technologies
(now owned by Zebra Technologies).
Versions and generations
Equipment frequently support multiple
versions of Wi-Fi. To communicate,
devices must use a common Wi-Fi version.
The versions differ between the radio
wavebands they operate on, the radio
bandwidth they occupy, the maximum
data rates they can support and other
details. Some versions permit the use of
multiple antennas, which permits greater
speeds as well as reduced interference.
Reference

https://en.wikipedia.org/wiki/Wi-Fi

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