Wi-Fi

Presented & performed by

Ranjith. BArunachalam.

PLCOMPUTER ENGINEERING

Wi-Fi Introduction Working principle Products Building a WiFi Network Wi-Fi Security Scope of WiFi

Bibliography Concluding remarks

Agenda

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.

Operating modes

• InfraStructure Mode AD HOC Mode

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 of 100 – 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.

A Way to Amplify WiFi Signals

A WiFi repeateris installed to extend coverage.

Wireless Local Area Networking

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.

WiFi Topologies

• The client communicates through Access Point.

• It connects the PC’S by an AP.

• It consists of 2 or Base Stations.

• It includes 10-15% overlap to allow roaming.

AP-based topology

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.

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.

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.

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

April 9, 2023 17

A SPECIAL SECURITY SOFTWARE

Wi-Fi Cameras used in BANKS

In few more years all electronic devices are going to have 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

“Things that think…

don’t make sense unless they link.”

Its time for small Demo…

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).

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

ACKNOWLEDGEMENT