This router is capable of "routing". That is, you connect PC's to it, either via ethernet cable or wirelessly. It then gives every connected computer an own internal IP address, and every computer can use the internet and connect to every computer in the network to for example share files. This is almost completely without any hassle, which ICS is known to have. From what I've heard it is a good router, above all very stable. It has also got an interesting thing, a linux based OS that you can modify and install different additions. More information on that here. One thing though. No official support by Linksys if you do that.