Wi-Fi Technology By: Mohamed Hassan Ali May, 2005

Topics Wi-Fi Products Wi-Fi IEEE Standards Wi-Fi Development Roadmap Wireless Network Modes 11/9/20132Wi-Fi Technology

Wi-Fi Products Wireless router (built-in modem) Access Points Client Adapters: – built-in – USB adapter – PCI wireless card – PCMCIA wireless card Antennas 11/9/20133Wi-Fi Technology

Wi-Fi Products Wireless LAN Controllers Wireless Integrated Switches and Routers Wireless IP Telephony Wireless Display Wireless Gaming Console 11/9/20134Wi-Fi Technology

Wireless router Cisco-Linksys WRT54GL Wireless-G Broadband Router 11/9/20135Wi-Fi Technology

Wireless Access Points Cisco-Linksys WAP54G Wireless-G Access Point 11/9/20136Wi-Fi Technology

Client Adapters 2000mW 2W g/n High Gain USB Wireless G / N Long-Rang WiFi Network Adapter 11/9/20137Wi-Fi Technology

Wireless Antennas & Range Expander 11/9/20138Wi-Fi Technology

Wireless LAN Controllers Cisco Catalyst 6500 Series/7600 Series Wireless Services Module (WiSM) 11/9/20139Wi-Fi Technology

Wireless Integrated Switches and Routers Cisco 2800 Series Integrated Services Routers 11/9/201310Wi-Fi Technology

Wireless IP Telephony Cisco Unified IP Phone 7900 Series 11/9/201311Wi-Fi Technology

Wireless Display 11/9/201312Wi-Fi Technology

Wi-Fi IEEE Standards Creation Year Bandwidth Radio Frequency Indoor Range [meter] Outdoor Range [meter] Jun Mbps2.4 GHz aSep 1999up to 54 Mbps 5 GHz bSep 1999up to 11 Mbps 2.4 GHz gJun 2003up to 54 Mbps 2.4 GHz nOct 2009up to 72.2 Mbps up to 150 Mbps 2.4 GHz 5 GHz /9/201313Wi-Fi Technology

Wi-Fi Development Roadmap a802.11b g n 11/9/201314Wi-Fi Technology

Wireless Network Modes Infrastructure Mode Ad-Hoc Mode Bridging Mode Repeater Mode 11/9/201315Wi-Fi Technology

Infrastructure Mode Infrastructure mode wireless networking bridges (joins) a wireless network to a wired Ethernet network. Infrastructure mode wireless also supports central connection points for WLAN clients. Infrastructure mode networks offer the advantage of scalability, centralized security management and improved reach. 11/9/201316Wi-Fi Technology

Infrastructure Wireless Network Diagram [Wireless Router] 11/9/201317Wi-Fi Technology

Infrastructure Wireless Network Diagram [Wired Router + AP] 11/9/201318Wi-Fi Technology

Ad-Hoc Mode Ad-Hoc mode is a method for wireless devices to directly communicate with each other. Operating in ad-hoc mode allows all wireless devices within range of each other to discover and communicate in peer-to-peer fashion without involving central access points 11/9/201319Wi-Fi Technology

Ad-Hoc Wireless Network Diagram 11/9/201320Wi-Fi Technology

Bridging Mode Bridging mode allows two or more wireless access points (APs) to communicate with each for the purpose of joining multiple LANs. Wireless bridges support: – Point-to-Point – Point-to-Multipoint 11/9/201321Wi-Fi Technology

Bridging Mode Bridge modes: – Bridge-only – Bridge & Access Point APs in bridging mode discover each other via Media Access Control (MAC) addresses that must be set as configuration parameters. 11/9/201322Wi-Fi Technology

Bridging Wireless Network Diagram 11/9/201323Wi-Fi Technology

Point-to-Point and Point-to-Multipoint Point-to-Point Point-to-Multipoint 11/9/201324Wi-Fi Technology

Repeater Mode Repeater mode is a variation on bridging. Rather than join multiple LANs, repeater mode is intended mainly to increase the range of a single wireless LAN by extending the same wireless signal. 11/9/201325Wi-Fi Technology

Repeater Wireless Network Diagram 11/9/201326Wi-Fi Technology

Positioning Guidelines 1.don't settle prematurely on a location 2.install the wireless access point or router in a central location 3.avoid physical obstructions 4.Avoid reflective surface 5.away from other home appliances that send wireless signals 6.install the unit away from electrical equipment 7.install a Wi-Fi repeater 11/9/201327Wi-Fi Technology

Wi-Fi Authentication & Encryption AuthenticationEncryption Open WEP Encryption [64 & 128 bits] Passphrase + Network Key Shared 802.1xNONE WPA TKIP AES TKIP+AES WPA/PSK WPA2 WPA2/PSK Mixed WPA2/WPA Mixed WPA2/WPA -PSK 11/9/201328Wi-Fi Technology

Thank You 11/9/201329Wi-Fi Technology