SSID
A SSID (service set identifier) identifies the wireless network and the SSID for your wireless WLAN card must match the SSID for any access point that you want to connect with. If the value does not match, you are not granted access to the network. Each SSID can be up to 32 characters long and [...]

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Free Wireless Network Training
If you are interested in a career in wireless networking a good foundation in networking fundamentals is very important.
Embedded below is a training video that covers the OSI Model, IP routing/switching, IP subnetting, IP Protocols (TCP, UDP, DNS, DHCP), 802.11a/b/g, and network security fundamentals.
Based on content the video was probably produced [...]

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There are dozens of 802.11n products available, but until now, none were certified by Wi-Fi Alliance. This meant that to guarantee compatibility, purchasers of 802.11n wireless networking equipment had to use an access point and wireless lan card from the same vendor. In 2000 802.11b adoption took off fueled by low cost consumer grade equipment [...]

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IEEE 802.11 Standard
Before diving in, a few terms related to WLANs need to be covered, ESS, PHY and MAC. My over simplistic definitions are below. Feel free to jump onto Google or Wikipedia to get more info.
PHY - how the bits get into the air
MAC - how devices/users get connected to wireless network/each other
ESS - [...]

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