Question: what is a "D-Link AirPlus DWL-G520 wireless PCI adapter rev.B? I have this installed in the back of my computer.   It has a little antenna on it.  What does it do?  Is it possibly for obtaining a internet signal from an ISP or something outside my house or a satellite?  Or is it just some dumb thing for picking up a signal from some kind of wireless router inside my house?

Answer: Your latter question is the correct answer. It is infact the wireless card to connect to your wireless router which in turn allows you to access the internet access without a cat5e/6 cable.
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