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Anatomy of a Wireless LAN – Part I

Learn about the ability to connect to a LAN or between multiple devices with 802.11b. Explore the glossary of terms used in 802.11b and understand the hardware requirements. Discover the differences between ad hoc and infrastructure networks with a hands-on demo. This informative article provides insights into the world of wireless Ethernet.

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Anatomy of a Wireless LAN – Part I

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  1. Anatomy of a Wireless LAN – Part I Chris De HerreraWebmaster, CEWindows.NETMicrosoft MVP – Mobile Devices

  2. 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

  3. 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

  4. Hardware Hardware Requirements • PC Card or CompactFlash Card supported by the Pocket PC – see http://www.cewindows.net/peripherals.htm • Access Point • Local Area Network

  5. 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.

  6. 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. Anatomy of a LAN – Part IQuestion and Answers Chris De HerreraWebmaster, CEWindows.NETMicrosoft MVP – Mobile Devices

  8. Anatomy of a Wireless LAN – Part I Chris De HerreraWebmaster, CEWindows.NETMicrosoft MVP – Mobile Devices

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