What speed is my networking card

So all of my info should be below. I would like to know if I have b/g/n capabilities. I know that I have an internal airport card, but am unsure of its speed. Where can I look to find out?
I got my iMac in October of 2006

Look here, regarding the +AirPort Extreme 802.11n Enabler+
http://store.apple.com/us/product/D4141ZM/A?mco=MTIxODk3Mw
The description give instructions for checking. I believe your iMac (if it's a white iMac with Core 2 Duo) is one of the models that qualifies, if it does not have it installed already.

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    Go to Solution.

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