1. SUBMITTED BY DINEEJ A 28 S3 EC
Wi-Fi TECHNOLOGY
SUBMITTED BY
DINEEJ A 28
S3 EC

2. CONTENTS INTRODUCTION WIFI TECHNOLOGY HOW A WIFI NETWORK WORKS
WIFI NETWORK TOPOLOGIES
WIFI CONFIGURATIONS
WIFI APPLICATIONS
WIFI SECURITY
ADVANTAGES AND DISADVANTAGES

3. INTRODUCTION Wi-Fi Stands For “WIRELESS FIDELITY”.
Wi-Fi Is An Alternative To Wired Technology, Used To Connecting Devices In Wireless Mode.
Wi-Fi Is A Generic Term That Refers To The IEEE COMMUNICATIONS STANDARD FOR WIRELESS LOCAL AREA NETWORKS (WLANs).
Wi-Fi Network Connect Computers/ Mobiles To Each Other, To The Internet And To The Wired Network.
Wi-Fi Works On Physical And Data Link Layer.

4. WIFI TECHNOLOGY
Wi-Fi networks use radio technology to transmit and receive data at high speed
IEEE b
IEEE a
IEEE g

5. IEEE 802.11a 2.4 GHz 11Mbps theoretical speed 100-150 feet range
Most popular, least expensive
Interference from mobiles and Bluetooth devices can reduce transmission speed

6. IEEE 802.11a 5 GHz 54 Mbps 50-75 feet range More expensive
Not compatible with b

7. IEEE 802.11g 2.4 GHz 54 Mbps 100-150 feet range
Combine the feature of both a&b
Compatible with IEEE802.11b

8. IEEE 802.11(a vs. b vs. g 802.11b 802.11a 802.11g Lowest price
Excellent signal range
Coverage penetrates most walls
Works withn public hotspots
Supports more user per room
Unaffected by interference from 2.4 GHz DEVICES
Can co-exist with b and g networks
Coverage limited to 1 room
Best value- only 10% premium for 5 times the speed of b
Compatible with b networks
Coverage penetrates most wall

9. ELEMENTS OF A WI-FI NETWORK
Access point(AP)- The AP is a wireless LAN transceiver or base station that can connect one or many wireless device simultaneously to the internet
Wi-Fi cards-They accept the wireless signal and relay information. They can be internal or external
SAFE GUARDS-Firewalls and antivirus software protect network from uninvited user and keep information secure

10. TOPOLOGIES 1- AP Based topology The client communicate through AP
BSA-RF coverage provided by an AP
ESA-It consists of 2 or more BSA
ESA cells includes 10-15% overlap to allow roaming

11. 2- Peer-to-Peer topology
AP 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

12. HOW A Wi-Fi NETWORK WORKS
A Wi-Fi hotspot is created by installing an access point to an internet connection
An AP act as abase station
When Wi-Fi enabled device encounters a hotspot, the device can then connect to the network wirelessly
A single AP can support up to 30 users and can functions within a range of feet indoors and 300 feet outdoors
Many AP can be connect together via Ethernet cable to obtain a single large network

13. Wi-Fi SECURITY SERVICE SET IDENTIFIER(SSID)
WIRED EQUIVALENT PRIVACY(WEP)
WIRELESS PROTECTED ACCESS(WPA)
WEP and WPA are encryption protocols that you can choose from in your router firmware
Wi-Fi protected access ,a subset of the up coming i security standard will replace the flawed wired equivalent privacy
without your SSID, people will not be able to join your Wi-Fi hotspot

14. ADVANTAGES Mobility Ease of installation Flexibility Cost Reliability
Security
Use unlicensed part of radio spectrum
Roaming
speed

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

16. CONCLUSION
Wi-Fi is a simple and cost effective way to connect to internet without the need of wires
It is going in popularity because of decreasing cost and the freedom it gives to user

17. THANK YOU
DINEEJ. A 28
S3 EC