|  | 13.1 |
Troubleshooting the 5-Router Network
| 13.1.2 |
Describe typical layer 1 errors

Layer 1 errors include: broken cables disconnected cables cables connected to the wrong ports intermittent cable connection wrong cables used for the task at hand (must use rollovers, cross-connects, and straight-through cables correctly) transceiver problems DCE cable problems DTE cable problems devices turned off