If you are running Windows XP and need to know how much throughput (speed and amount of data moving through the network) your network is experiencing, you can use the performance monitor that comes will all Windows XP installs.
- Select Start>Run
- Type in perfmon and Performance Monitor will start up
- Select System Monitor From the menu on the left of the screen
- With your mouse, right-click on the graph and select "add counters"
- In the "add counters" dialog box, from the Performance Object dropdown menu select "network interface"
- Then select the "select counters from list" dialog button and then select
- Now select the Network Interface Card you want to monitor (the one hooked up to your network of course)
- Select the counters ( bytes/sec etc) you want and select the "add" button.
That's it. You can use this same Performance Monitor to monitor many other things on your PC. Play around with it and make it graph what you want it to. It makes a great troubleshooting tool without the need to install anything additional.