I am looking for something that I can use for a couple of days, whether it be a trial or freeware, to monitor my network. I am experiencing some slowdowns and I think it is because of a client machine. I don't know if someone has a virus or what, but every now and then my network gets bogged down by data being sent out of my network to the internet. Is there any software that will monitor the bandwidth usage by IP address? If I can find the client machine that is causing the problem, I should be able to get it fixed.