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

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

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 802.11 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.

WIFI TECHNOLOGY Wi-Fi networks use radio technology to transmit and receive data at high speed IEEE 802.11b IEEE 802.11a IEEE 802.11g

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

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

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

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

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

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

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

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 100-150 feet indoors and 300 feet outdoors Many AP can be connect together via Ethernet cable to obtain a single large network

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 802.11i security standard will replace the flawed wired equivalent privacy without your SSID, people will not be able to join your Wi-Fi hotspot

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

LIMITATIONS Interference Degradation in performance High power consumption Limited range

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

THANK YOU DINEEJ. A 28 S3 EC