Yes, I'll admit it: I'm computer stupid! I am considering getting Embarq DSL (I currently use NetZero dialup). The specs on the website say you need to make sure you have an Ethernet card. Uh, how do I know if I have one??? If it helps, I got my computer (Dell desktop) in '02 or '03 (not at home to check exactly when). I think I need to take a more up to date computer class than the ones I had before the Interwebs began - LOL!
go to my computer and right click. then click on properties, got to device manager and there should be a icon called network adaptors. If there is then you have one installed, if not then you probably don't
Another quick way to tell is look at the back of your computer to see if you see something that looks like a phone jack. It will be slightly larger than your modem's phone jack. Since you are currently using Netzero, you already have a phone cord plugged into your modem. Just look to see if you have a similiar looking jack but just bigger.