If the IOS image of your Router is corrupted for some reason, or if you want to install a newer version, you can do so easily with Rommon Mode. This mode can be expressed as a disaster recovery area.
With the Cisco Packet Tracer network simulation program, we can easily backup the IOS image to the TFTP server.
You can easily backup the IOS images of network devices such as Router and Switch to a TFTP server and restore it later.
It may be a good idea to back up any settings you have made on the Cisco Router. If your router’s NVRAM fails, the initial configuration file cannot be loaded and you will lose your existing settings.