1. WI-FI
TECHNOLOGY

2. INTRODUCTION
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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.

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

4. BUILDIING A WI-FI
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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.

5. THE WI-FI TECHNOLOGY
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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

6. WI-FI TOPOLOGIES
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AP based topology
Peer-to-peer topology
Point-to-multipoint bridge topology

8. TO FIX A PROBLEM WITH YOUR WI-FI
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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

9. WI-FI SECURITY
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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.

10. LIMITATIONS
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Interference
Degradation in performance
High power consumption
Limited range

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

12. THANK YOU