|  | 7.6 | Basic Ethernet 10Base-T Troubleshooting
| 7.6.1 | Troubleshooting workstations
There are many approaches to network troubleshooting. The first is to work up through the layers of the OSI model. This method isolates problems that can masquerade as other problems. You can waste a lot of time troubleshooting a browser that does not function properly, only to find that the computer is not connected to the network. It is best to start troubleshooting at Layer 1. Ask yourself whether things are plugged in and connected before you go to the next higher level, with its more complicated issues. An effective troubleshooting approach by OSI layer is summarized in the graphic.