[CLUE-Tech] Network analyzer.

[David Anselmi]

Does anyone know of any open source network analysis software?  If not,
how about a recommendation for comercial software?

If I were to get such a thing, where could I look to learn how to use
it?  (Web, books, classes preferred in that order.)  Normally I look for
a how-to or other linux doc, but there doesn't seem to be much available
on this at the LDP.

Thanks.
Dave