An administrator is reviewing the organization's disaster recovery plan and wants to confirm that critical files can be brought back online after a ransomware attack. Which of the following activities BEST demonstrates that the backup strategy will enable a full recovery?
Performing a periodic restoration test in a nonproduction environment.
Storing backup tapes in an offsite, climate-controlled vault.
Encrypting the backup archives with AES-256.
Scheduling differential backups to run every hour.
Periodically restoring data from backup media in a test (or otherwise nonproduction) environment proves that the data can actually be recovered and that the organization's procedures meet recovery-time and recovery-point objectives. Encrypting archives, storing tapes off-site, and scheduling differential backups all improve aspects of confidentiality, availability, or frequency, but none of them confirms that the data can be restored successfully.
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Why is a periodic restoration test in a nonproduction environment important?
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What is the difference between recovery-time objective (RTO) and recovery-point objective (RPO)?
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How does encrypting backups with AES-256 differ from actually testing the restoration process?