ccna 200-301 pdf dumps

ccna 200-301 pdf dumps.40 Chapter 2 Protecting Network DevicesTo upgrade the archive file to a new running image, re-enter the secure boot-image command from the console and information about the upgraded image will be displayed, and the old image is released and can be viewed with the dir command.The CiscoIOS image resiliency feature can only be disabled through the console session with the help of the no form of the command. This command works properly only if the system is configured to run the image file from flash memory and the flash memory has an ATA interface. In addition, the running image must be loaded from permanent storage in order to be protected as a primary image; images started over a network (e.g., a TFTP server) are not protected.In global configuration mode, a snapshot of the router's running configuration file can be obtained and securely archived in permanent storage using the secure boot-config command. A log message displayed on the console informs the user that the resilient configuration is active. The archived configuration is hidden and cannot be viewed or deleted directly at the CLI prompt.Configuration upgrades are similar to mirroring upgrades. This feature detects a different CiscoIOS configuration version and notifies the user of the version mismatch. After committing a new configuration command, the secure boot-config command can be run to upgrade the configuration archive file to a newer version.2.3.1.3 Restoring the Master Boot Set ImageIn the CLI, protected files do not appear in the output of the dir command. This is because the CiscoIOS file system prevents the files from being listed. Because running configuration and mirror files are not displayed in the dir command output, you can use the show secure bootset command to verify that the archive files exist. Verifying that CiscoIOS images and configuration files are backed up and protected is an important step.After the CiscoIOS file system prevents the display of these files, ROM monitor mode (ROMmon) is not subject to this restriction and can list and boot these protected files.Restoring Boot Set FilesThere are five steps to recover the master boot set (primaiybootset) from the security archive after the router has been compromised.