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the due rocks.
I have used the dude for a couple of years now and love it, its simple to use and very reliable.It provides me with a great overview of my network quickly and accurately.In simple, the dude is a great bit of software but i have just found another network map tool which promises to be HUGE!http://www.spiceworks-news.co.uk/2009/06/spiceworks-network-map/Its currently in beta but promises to do what you want, they have even put a feedback button in which they say they will read all requests.Its free so why not check it out, you havn't got anything to lose :-)There is a huge support team of voluenteers and staff on the Spiceworks community ready to help you with all questions.
Pros: Free, fast, reliable
Cons: can be confusing