56k modem ?
 

Stupid question..I use a cable modem, so when I buy a new desktop, that comes with ethernet, I dont need to buy an internal 56k modem..right...??

I know this is ignorant..but whatever.

There probably isn't really reason to have one. The only way it's going to be beneficial to you in the case that your cable modem goes down, is to dial into a service which you'll have to pay for anyway aside from your cable bill.

I would probably just pass on the modem.

A teacher once told me, "The only stupid question is the one you don't ask"

I echo Bendsley, if it comes with it, so be it, but I don't see the need to buy one if you're already with cable. You can easily add one later if the need arises.