I was wanting to know if there were any good network sniffers.I finally got my old 486 which has linux on it to network with my newer computer and I was hoping to try somthing out.And also to see how XP pro stands up to beatings.

SO if anyone knows any good network sniffers, or any tool to help me test my network it would be great to the hear them.
I'm going to use the laptop to beat on it and it has windows on it ( I know but linux wasn't compatible with the modem)sucks.