In this section, we determine the effect of running MAGNeT through a variety of tests. We compare overall attainable bandwidth on a system running MAGNeT to that of a system running tcpdump as well as a system running no monitoring software. We also look at CPU utilization under these conditions and at the effect of MAGNeT on real-time traffic streams such as multimedia traffic. We conclude the section with a brief discussion of how the different design decisions made in MAGNeT and other monitors result in the observed performance differences.