Best way to measure network bandwidth

I would like to take some readings of the amount of network bandwidth
being consumed by various web sites. That is, I would like to know how
many bytes are being sent to my computer each time I click on a page.

Is there a tool built into Windows 2000 to do this?

I double-clicked on the Local Area Connection icon in the taskbar (the
two monitors). That opens up the Local Area Connection Status panel.
It gives me the number of "packets" sent and received. Is there some
way to determine packet size? I assume it's variable, so this might
not help.

I also discovered a system tool called "Performance" or something like
that. It is invoked using the MMC command from the Run DOS box. It
appears that this will do it, but I couldn't figure out how to use it.

I just need a simple tool to measure butes received.

Thanks



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