|  | 4.1 | Router Components
| 4.1.1 | External router configuration sources
In this section, you will learn about the router components that play a key role in the configuration process. Knowing which components are involved in the configuration process gives you a better understanding of how the router stores and uses your configuration commands. Being aware of the steps that take place during router initialization will help you determine what and where problems may occur when you start up your router. You can configure a router from many external locations as shown in the Figure, including the following: from the console terminal (a computer connected to the router through a console port) during its installation via modem by using the auxiliary port from Virtual Terminals 0-4, after it has been installed on the network from a TFTP server on the network