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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
THANK YOU