The copy running-config startup-config command copies the configuration currently in RAM to NVRAM. This is useful if you want to save your changes before you reboot the router.
The information in ROM will alter. RAM's data structure will alter. The information in NVRAM will be altered.
To replace the current startup config file with the contents of the running configuration file, issue the command copy running-config startup-config (copy run start).
The command show running-config shows the active configuration that is currently running in memory. c. Copy run start or copy running-config startup-config copies the active configuration currently in use to NVRAM.
To Know more about configuration
https://brainly.com/question/13410673
#SPJ4