Cisco Certified Network Associate (CCNA) Practice Exam

What command is used to change the router configuration to a running state?

1. copy run start

2. enable

3. config terminal

4. execute run

The correct answer is: copy run start

The command used to change the router configuration to a running state is "copy run start." This command is crucial for saving the current running configuration to the startup configuration file in a Cisco router. The running configuration is the active configuration that the router is currently using, while the startup configuration is the configuration that the router will use when it is restarted. By issuing the command "copy run start," you ensure that any changes made to the running configuration are saved before a reboot or power loss, thus preventing loss of any critical settings. In context, the other options serve different purposes. "Enable" is used to access privileged EXEC mode, allowing the user to execute more advanced commands, but does not directly affect the configuration state. "Config terminal" is a command used to enter global configuration mode but does not change the state of the running configuration itself. "Execute run" is not a standard command in Cisco IOS and would have no effect on the configuration state.