Good Bandwith/Network Monitoring Program

[elnino84]

I am looking for a program like one of the following: IRIS, ETHERPEEK NX, SNIFFER BASIC. But I can't afford 4000 bucks, so if it is freeware, or at least a really good demo. Please let me know. Thanks.

 

[TheBlueRaja]

Ethereal is your best bet - its pretty damn good and free too.

http://www.ethereal.com/