I have a quick question for you experts..

They are coming to install my cable modem in about a week.. Currently, I have no software installed for my DSL connection - all of that is handeled by my router (which they say not to do, but it works). Will I beable to do this with my cable modem too? They asked me what OS I was running and I can only assume they're going to ask to install something on my computer.. sigh.