Which command is used to save the cisco router configuration?
- wr
- wr mem
- copy current-config startup-config
- All of above
Explanation
To save the Cisco router configuration, you can use the “wr mem” command or the “copy running-config startup-config” command. The “wr mem” command writes the current running configuration to the router’s non-volatile memory (NVRAM), where the startup configuration is stored.
The “copy running-config startup-config” command also copies the current running configuration to the startup configuration in NVRAM.
You can also use the “copy current-config startup-config” command, but this is not a commonly used command because it copies the current configuration (the one currently being edited) to the startup configuration, rather than the running configuration.
Any unsaved changes you have made to the current configuration will be saved to the startup configuration. It is generally a better practice to use either “wr mem” or “copy running-config startup-config” to save the running configuration, rather than the current configuration.
Therefore, The correct answer is “wr mem” or “copy running-config startup-config”.