if you're not sure then most likley it don't.
If you hav cable/dsl most likley you do, unless it's usb or parallel.
it'll be on the back of your pc (most of the time).
it'll have a connection that looks like a phone connector only a little bigger.
if you have a BBA (BroadBand Adapter) for your DC, then it just might be that your pc has one.
Ask the company where you bought it from and ask or ask a friend who might know what a Network card is.
Do you have a Cat 5 (Category 5) UTP (Unshielded Twisted Pair) cable? it looks like a regular phone cord, but again, a little thicker and bigger.
You'll need it to be a crossover to connect your dc directly to your PC.
Clear now?