I recently picked up a Cisco 2500 and Cisco 4000 router. I don't know much about them but I do have some study guides for Cisco and would like to work with them. They both fire work the problem is I don't know what adapters I need to connect these routers to my computer. I know I need a serial to ethernet from the router and then an ethernet to serial for the computer however where can I get these adapters? I'm located in Ontario, Canada. Is there anything else I should consider?