If you need a network discovery tool for information on your network about IP addresses, hosts (and a whole lot more) but command-line tools intimidate you, take a look at this Zenmap tutorial. It works together with Nmap, the free, crossplatform network discovery tool. I think I’ve run across tools that I can use to get this done before but I don’t remember any of them being quite this simple to implement. In any case I have had Zenmap recommended to me before so this tutorial is definitely going into my “you want to look at this later” bookmark folder. Take a look.