A student wants to save a router configuration to NVRAM. What is the best command to use to accomplish the task?

To save a router’s current configuration to NVRAM (Non-Volatile Random-Access Memory), ensuring that the configuration is retained even after a reboot, the student should use the command:

copy running-config startup-config

This command is used on Cisco routers and switches. It copies the current running configuration (which is active and stored in RAM) to the startup configuration (which is stored in NVRAM). When the device restarts, it loads the configuration stored in the startup-config file.

The other commands listed serve different purposes:

• show interfaces provides detailed information about the router’s interfaces.
• show ip nat translations displays the Network Address Translation (NAT) translation table.
• show ip route shows the routing table of the router.