How to Find a Network Bottleneckby eHow Contributor
If you've ever wondered why sometimes when you connect to a website it's fast and other times it's slow, there is an answer. Your request may go through many routers and switches before it gets to its destination, and sometimes some of the network switches or routers could be having problems. This will cause the slowness. You can check to determine what is causing your particular network bottleneck in a few steps.
Right-click an empty spot on your system tray -- usually at the bottom of your computer screen -- and select "Task Manager."
Click the "Networking" tab.
Click "View" in the options above the tabs and click "Select Columns."
Click to check "Bytes Sent/Interval" and "Bytes Received/Interval." Click "OK."
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