Wireless Networking
description
Transcript of Wireless Networking
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