WIRELESS NETWORKING

ByAlvin Tse

Governing Bodies and Organizations

FCC – Federal Communications Commission http://www.fcc.gov/

IETF – Internet Engineering Task Force http://www.ietf.org/

IEEE – Institute Of Electrical and Electronics Engineers http://www.ieee.org/portal/site

Air Defense http://www.airdefense.net/

Cisco Systems, Inc. http://www.cisco.com/

Wi-Fi Alliance http://www.wi-fi.org/

Benefits and Drawbacks Benefits

Mobility Reduced Costs Flexible Distance

Drawbacks Dead Spots Interference Interoperability Security

Standards IEEE – 802.11

802.11 2.4GHz 2Mbps 802.11b 2.4GHz 11Mbps 802.11g 2.4GHz 54Mbps 802.11a 5.0GHz 54Mbps 802.11n 5.0 & 2.4 GHz 144Mbps

Architecture

Site To Site / Point to Point

Point to Multipoint / Hub and Spoke

Last Mile Wireless Internet Service Provider (WISP)

Site to Site / Point to Point

Point to Multipoint / Hub and Spoke

Last Mile / WISP

Devices Access Points

Root Mode Bridge Mode Repeater Mode

Antennas Omni Directional / Dipole Semi Directional Highly Directional

Root Mode

Bridge Mode

Repeater Mode

Omni Directional / Dipole

Omni Directional Outdoor

Omni Directional Indoor

Semi Directional

Semi Directional - Yagi

Semi Directional - Patch

Highly Directional - Dish

Highly Directional - Grid

Security WEP – Wired Equivalent Privacy WPA – Wi-Fi Protected Access Broadcast SSID off MAC Filtering Redirecting Packets Authentication

EAP (Extensible Authentication Protocol) LEAP (Lightweight Extensible Authentication Protocol) PEAP (Protected Extensible Authentication Protocol) RADIUS (Remote Authentication Dial In User Service) VPN

Authentication RADIUS

Authentication VPN