|  | 4.4 | Basic Networking Testing
| 4.4.1 | Testing process that uses the OSI model
Addressing problems are the most common problems that occur on IP networks. It is important to test your address configuration before continuing with further configuration steps. Basic testing of a network should proceed in sequence from one OSI reference model layer to the next. Each test presented in this section focuses on network operations at a specific layer of the OSI model. As shown in the Figure, telnet, ping, trace, show ip route, show interfaces and debug are commands that allow you to test your network.