What action ensures that a switch can revert to a known good software version if the current image becomes unstable?

• A. Performing a software rollback to a previous, reliable image or configuration
• B. Deleting the certified directory
• C. Disabling ISNS failover
• D. Executing a reload on both CMMs simultaneously

Answer: (A)

The action that ensures a switch can return to a known good software version when the current image becomes unstable is performing a software rollback to a previous, reliable image or configuration. Restoring a previously tested and verified image brings the system back to a stable state, using software and settings that were confirmed to work, which is exactly what’s needed when the current image shows instability. This directly addresses software integrity and system reliability.

Deleting the certified directory wouldn’t provide a tested recovery path and could disrupt security or validation processes. Disabling ISNS failover affects storage networking redundancy rather than the software image. Reloading both CMMs resets components but does not revert the firmware to a prior, stable version.