Transcript Document
Anatomy of a Wireless LAN – Part I Chris De Herrera Webmaster, CEWindows.NET Microsoft MVP – Mobile Devices 7/20/2015 1 Overview Ability to connect to a LAN or between multiple devices with 802.11b Glossary of the terms used in 802.11b. Hardware Requirements Ad Hoc vs Infrastructure Hands-on Demo 7/20/2015 2 Glossary 802.11, Wireless Ethernet - A wireless local area network protocol which allows high speed access to network resources. It operates at 11, 5.5, 2 and 1 megabits per second depending on distance. It uses the 2.4 ghz spectrum using direct sequence spectrum (DSS).. WECA is the industry consortium which works with vendors on interoperability. ESSID – Extended Service Set Identifier - Specifies which 802.11b network you are joining. Some systems allow you to specify ANY SSID as an option so you can join any network. WEP - Wired Equivalent Privacy - the standard for encrypting data over an 802.11b wireless network. This 40 or 128 bit encryption has been shown to be insecure. So the current recommendation is to use a VPN to secure corporate data. Additional terms are defined at http://www.cewindows.net/glossary.htm 7/20/2015 3 Hardware Hardware Requirements PC Card or CompactFlash Card supported by the Pocket PC – see http://www.cewindows.net/peripherals.ht m Access Point Local Area Network 7/20/2015 4 Ad Hoc vs. Infrastructure Ad Hoc is the term used to explain when a user is connecting to another 802.11b device directly without an access point. The user must decide what IP address and subnet to communicate. Infrastructure is the term used to explain when a user is connecting to the wireless LAN using an Access Point. The Access Point or another network device can provide services like DHCP and NAT. 7/20/2015 5 Demonstration Basic configuration of a Symbol Spectrum 24 4111 Access Point (The latest version, 4131 is being used here at the Pocket PC Summit to provide internet access. Basic configuration of a Pocket PC 2002 using a Socket Wireless LAN card. 7/20/2015 6 Anatomy of a LAN – Part I Question and Answers Chris De Herrera Webmaster, CEWindows.NET Microsoft MVP – Mobile Devices 7/20/2015 7 Anatomy of a Wireless LAN – Part I Chris De Herrera Webmaster, CEWindows.NET Microsoft MVP – Mobile Devices 7/20/2015 8