I am wanting to study for my ccna but i have no cisco equipment. Can I buy a simulator or should I buy a router or two ? I have been looking at ebay for cisco routers i have found some between 2 and 300 dollars but I do not Know what to get. I have never used cisco equipment but I want to learn and pass the ccna exam. Do I have to know alot about IOS to pass the ccna exam ? Also I have DSL internet will those routers accept a DSL Internet connection from my modem?