A Presentation

On

Prepared By:- Ashish Meena 7th Sem

Submitted To:-Pradeep Sharma (HOD)

Aashu Ashish Meena

CONTENT

IntroductionComponentTransmission Technique NetworkWi-fi SecurityApplicationConclusion

Aashu Ashish Meena

INTRODUCTION

An expensive broadband network that can keep you connected while you move about home or office.

The broadband wireless web is being built around the technology called WI-FI.

WI-FI is stand for WIRELESS FIDELITY.

Aashu Ashish Meena

WHY WI-FI?

1) MOBILITY 2) SCALABILITY 3) INCRESED RELIABILITY 4) REDUCED INSTALLATION TIME 5) FINANCIAL BENEFIT 6) LONG – TERM COST SAVINGS

Aashu Ashish Meena

WI-FI STANDARDS

1) 802.11:-

This standard allows wireless connection up to 300 feet from an access point and can easily be added to existing wired networks with speeds up to 11 mbps.

2) 802.11a:-

This provides a bigger pipe for data and supports more simultaneous users.

It can support up to 54 mbps.

Aashu Ashish Meena

3) 802.11b:

The popular 802.11b WI-FI devices broadcast in the 2.4Ghz band used by cordless phones.

Aashu Ashish Meena

COMPONENTS OF WI-FI

There are currently two types of components:-

1) WI-FI radio devices. 2) Access points or gateway that act as

base station. A third type WI-FI equipped

peripherals are emerging and will soon be common place,this group includes printers, scanner ,cameras etc.

Aashu Ashish Meena

Some components of WI-FI

PC CARD RADIO.

Aashu Ashish Meena

MINI-PCI MODULES AND EMBEDDED RADIOS.

Aashu Ashish Meena

USB ADAPTERS

Aashu Ashish Meena

PCI AND ISA BUS ADAPTERS.

Aashu Ashish Meena

ACCESS POINTS AND GATEWAY.

Aashu Ashish Meena

WHAT TRANSMISSION TECH.WI-FI USED?

1) NARROWBAND TECHNOLOGY

2) SPREAD SPECTRUM TECHNOLOGY

3) FREQUENCY HOPPING SPREAD SPECTRUM (FHSS).

4) DIRECT SEQUNCE SPREAD SPECTRUM (DSSS).

Aashu Ashish Meena

ABOUT NETWORK

WHAT MAKES UP A WIRELESS NETWORK ?

Wi-Fi devices "connect" to each other by transmitting and receiving signals on a specific frequency of the radio band.

Your components can connect to each other directly or through a gateway or access point.

When you create your Wi-Fi network it will consist of two basic components:

1. Wi-Fi radios

2. access points or gateways.

Aashu Ashish Meena

PLANNING FOR ACCESS POINTS AND GATEWAY..

A Wi-Fi network operates more effectively when using a central wireless base station to coordinate communications. There are two types: a gateway and an access point.

Most home and small office networks should use a Wi-Fi gateway.

Aashu Ashish Meena

WI-FI SECURITY

WI-FI CERTIFIED = CONFIDENCE WI-FI PROTECTED ACCESS ENHANCED DATA ENCRYPTION

THROUGH TKIP(TEMPORAL KEY INTEGRITY PROTOCOL).

WI-FI PROTECTED ACCESS FOR HOME/SOHO.

Aashu Ashish Meena

WI-FI APPLICATION..

1) WIRELESS EDUCATION 2) WIRELESS BUSINESS CENTERS 3) SMALL OFFICES 4)HOSPITALS 5) ACCOUNTING 6) WAREHOUSE

Aashu Ashish Meena

CONCLUSION..

For now ,WI-FI primarily provides broadband internet access to specially outfitted pcs and laptops .but in future may be most of hotspots be wireless.

By WI-FI our time and money both are save..

Aashu Ashish Meena

Aashu Ashish Meena

Any Query

Aashu Ashish Meena