1. Access Point Fall Semester, 2008. School of Computer Science & Engineering, Seoul National University. Professor Yanghee Choi Student : MyungHoon Kim

2. 2 1. Introduction WAP(Wireless Access Point) IEEE 802.11 ▶ current popular IEEE standard for wireless networking Short Range ▶ 1.5-2Km(theoretically) 20 – 30m(small office)

3. 3 2. Access Point vs. Ad-Hoc Network Ad-Hoc ▶ Dynamic Topology ▶ Mobility ▶ decentralization AP(Access Point) ▶ Infrastructure ▶ Efficiency ▶ Stability

4. 4 3. Limitations IEEE 802.11 ▶ 30 client systems located within a radius of 100 m Interference between AP Data Errors Depends on Environment ▶ indoor or outdoor placement, height above ground, nearby obstructions.

5. 5 4. Security Wireless traffic encryption WEP, WPA, WPA2 RADIUS (Remote Authentication Dial - In User Sevice )