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?
Encrypting the backup archives with AES-256.
Storing backup tapes in an offsite, climate-controlled vault.
Scheduling differential backups to run every hour.
Performing a periodic restoration test in a nonproduction environment.
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 it important to test backup restorations?
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What types of loss events should backups be prepared for?
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What are some common methods for testing backup restorations?