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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