1. IEEE 802.11 standards (Wireless LANs) Presented by Danu Hunskunatai

2. IEEE 802.11 standards (Wireless LANs) Definitions : 802.11 & Wi-Fi Advantages and Disadvantages Wireless Communication: Methods Compare IEEE Standards Future : Standards & security

3. What is IEEE 802.11 IEEE 802.11 is the specification standard for WLANs. Transmission via unlicensed radio spectrum for infrastructure networks or ad-hoc networks.

4. What is Wi-Fi Wi-Fi means “Wireless Fidelity”. Wi-Fi Alliance organization gives Wi-Fi certified logo. Wi-Fi technologies based on IEEE 802.11b standards.

5. Wireless Advantages Portability & Mobility – easy to move Flexibility & Scalability – can add computer Cost of Ownership – no cable maintenance

6. Wireless Disadvantages Uses a lot of battery power Throughput (Speed) – Speed & feed Transmission range – Limited (150 feet) Cost – Now, more expensive than wire equipment Security – Hackers can access

7. Wireless communication method Infrared (IR) : inexpensive, but human can interfere Microwave : longer range (30 Miles), but atmospheric condition can disrupt Radio Frequency (RF) : short range (150 feet) but less interference DSSS – Restore data w/o retransmission FHSS – Easy to build OFDM – carry a large volume of data

8. Comparing IEEE Standards Standards 802.11802.11a802.11b802.11g ApprovedJul. 1997Sep. 1999 Expected 2003 Transmission range LongShortLong Cost (equipment) NAExpensiveCheapThe best! Throughput1, 2 Mbps54 Mbps11 Mbps11, 54 Mbps Compatibility802.11Wi-Fi5Wi-Fi Wi-Fi at 11 Mbps

9. Future : Standards StandardsWhat they will offer? IEEE 802.11dWorldwide compatible frequency. IEEE 802.11eBetter voice and video. IEEE 802.11fAll access points will be compatible. IEEE 802.11iImproved security system.

10. Future : 802.11i Security IEEE 802.11iNow IEEE 802.1X Advanced Encryption Standard (AES)R&D Temporal Key Integrity Protocol (TKIP) Protected EAP (PEAP)

11. “The Future is now” The end.