I have broadband cable internet with Cablevision and using a Scientific Atlanta cable modem.  I want to connect this device to a router (2610) via ethernet only for my local LAN.  How do I configure the router for this?  Or can someone point me in th...

What's the difference between a 2621 router and a 2621xm router? Besides the obvious of one being fast at 25k pps (2621) and the other faster at 30k pps (2621xm).   Which one would be better for CCNA security? Thanks.

I am new to this so please take it easy on me. What kind of interface module do I need in order to hookup a Cable dsl modem to a 2524 or 2621 router? I've tried looking but can't find anything. Also how to I get the ios to upgrade these routers? Any...