Wi fi technology

WI-FI TECHNOLOGY

INTRODUCTION

a mechanism that allows an electronic device to exchange data wirelessly over a computer network

"Wi-Fi" is a trademark of the Wi-Fi Alliance and the brand name for products using the IEEE 802.11 family of standards. 

A device enabled with Wi-Fi can connect to a network resource such as the Internet via a wireless network access point.

COMPONENTS OF WI-FI

It is a two-way radio communication. It consists of : computer's wireless adapter, access point, a wireless router and an antenna.

BUILDIING A WI-FI

A Wi-Fi hotspot is created by installing an access point to any 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.

THE WI-FI TECHNOLOGY

Wi-Fi networks use radio technologies to transmit & receive data at high speed.

IEEE set of standards are : IEEE 802.11a IEEE 802.11b IEEE 802.11g IEEE 802.11n

WI-FI TOPOLOGIES

AP based topology Peer-to-peer topology Point-to-multipoint bridge topology

TO FIX A PROBLEM WITH YOUR WI-FI

Step 1 – Reset the Router

Step 2 – Check the Password

Step 3 – Try a Direct Connection to the Internet

Step 4 – Check Your Wireless Settings

Step 5 – Check Your Wireless Connection

WI-FI SECURITY

WEP (Wired Equivalency Privacy) standard was intended to make wireless network 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.

LIMITATIONS

Interference Degradation in performance High power consumption Limited range

APPLICATIONS

Home Small businesses Large corporations & campuses Health care Wireless ISP (WISP) Travellers

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