Troubleshooting is a necessary part of supporting any network installation. Determining and repairing problems can consume a lot of time, especially if you don't know what to do or how to do it correctly and quickly. This paper will explain how you might consider troubleshooting different problems that could exist in your network. These techniques can all be performed using some of the common tools available in modern operating systems. The more you know about these tools, the better you can use them to fix your problems.