Wifi 355a5j

Presented & performed by

ORIGINAL AUTHOR

Arunachalam. PL

Agenda  Wi-Fi Introduction Working principle Products Building a WiFi Network Wi-Fi Security Scope of WiFi  Bibliography  Concluding remarks

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 up to 30 s 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 repeater is installed to extend coverage.

Wireless Local Area Networking

Locating Hotspots The Beat Goes on.. 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 AP-based topology

• • • •

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.

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. -friendly software. Security features. Global set of standards.

Wi-Fi Security 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.

A SPECIAL SECURITY SOFTWARE

April 8, 2012

17

Wi-Fi Cameras used in BANKS

SCOPE OF Wi-Fi 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.

Its time for small Demo…

“Things that think… don’t make sense unless they link.”

This Paper has been submitted under the guidance of

Mr.M. Ramesh Kumar, MCA.,Mphil – HOD i/c (Computer Engg). Mr.M. Saravanan (M.E) – Senior Lecturer (Computer Engg). K. Megala B.E

– Lecturer (Computer Engg).

Over headed by

MR.D.ARUL SELVAN M.E., Head Of the Department / Computer Engineering

Bibliography www.wikipedia.com www.howstuffworks.com www.palowireless.com www.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