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Presented & performed by
ORIGINALAUTHOR
Arunachalam.
PL
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Wi-Fi
Introduction
Working principle
Products
Building a WiFi Network
Wi-Fi Security
Scope of WiFi
Bibliography
Concluding remarks
Agenda
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Wireless Fidelity (Wi-Fi)
Welcome to the World of Wireless
A radio technology that networks the devices.
Refers to wireless LAN products based on the IEEE 802.11b
specification
Provides easy connections to the internet and business
networks while traveling
The main attractive feature of this technology is that it can
provide wireless broadband connection within a specific
geographic boundary.
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Operating modes
InfraStructure ModeAD HOC Mode
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Building a WiFi
A Wi-Fi hotspot is created by installing an access point to
an internet connection.
An access point acts as a base station.
When Wi-Fi enabled device encounters a hotspot the
device can then connect to that network wirelessly.
A single access point can support up to 30 users and
can function within a range of100 150 feet indoors
and up to 300 feet outdoors.
Many access points can be connected to each other
via Ethernet cables to create a single large network.
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A Way to Amplify WiFi Signals
A WiFi repeateris installed to
extend
coverage.
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Wireless Local Area Networking
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The Beat Goes on..
Locating Hotspots
There are many WiFi hotspots now
available in public places like restaurants,
hotels, libraries and airports.
For example, Spenzer PLAZA
The number of hotspots in the world is
growing daily.
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WiFi Topologies
The client communicates through Access Point.
It connects the PCS by an AP.
It consists of 2 or Base Stations.
It includes 10-15% overlap to allow roaming.
AP-based topology
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Peer-to-peer topology
Access Point is not required. Client devices within a cell can
communicate directly with each other.
It is useful for setting up of a wireless
network quickly and easily.
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Point-to-multipoint bridge topology
Used to connect a LAN in one building to a LANs in
other buildings even if the buildings are miles apart.
Range varies based on the type of wireless bridge
and antenna used as well as the environmental
conditions.
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Wireless Fidelity
Advantages
Mobile.
Widely available in public venues.
Relatively inexpensive.Easy to set up a network.
User-friendly software.
Security features.
Global set of standards.
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WEP stands for Wired Equivalency Privacy
As its name implies, this standard was intended
to make wireless networks as secure as wired
networks.
The common key lengths are currently 128- and
256-bit.
WPA Wi-Fi Protected Access is an early version
of the 802.11i security standard that was
developed by the Wi-Fi Alliance to replace
WEP.
Wi-Fi Security
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April 8, 2012 17
A SPECIAL SECURITY SOFTWARE
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Wi-FiCameras used in BANKS
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In few more years all electronic devices are going tohave a built in Wi-Fi..
So once again we welcome to World of wireless.
Many colleges and businesses have suitable
building layouts that can be wireless to build a unwired
network.
Wi-Fi is a very cost effective alternative in these
environments.
SCOPE OF Wi-Fi
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Things that think
dont make sense unless they link.
Its time for small Demo
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This Paper has been submitted under the guidance of
Over headed by
Mr.M. Saravanan (M.E) Senior Lecturer (Computer Engg).
K. Megala B.E Lecturer (Computer Engg).
MR.D.ARUL SELVAN M.E.,
Head Of the Department / Computer Engineering
Mr.M. Ramesh Kumar, MCA.,Mphil HOD i/c (Computer Engg).
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Bibliographywww.wikipedia.com
www.howstuffworks.com
www.palowireless.com
www.technologyreview.comwww.technologyreview.com
http://www.wirelessethernet.org/index.html
http://grouper.ieee.org/groups/802/index.html
http://standards.ieee.org/getieee802/
http://www.cisco.com
http://grouper.ieee.org/groups/802/11/index.html
http://grouper.ieee.org/groups/802/15/index.html
www.sss-mag.com/ss01.html#other
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ACKNOWLEDGEMENT