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CompTIA Security+ study material · question 571 of 611
An organisation confirms backups complete successfully every night. What does CISA say this does not establish?
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Answer: D. That the data can actually be restored
An untested backup is an assumption; only a tested restore is a control.
Source: CISA #StopRansomware Guide (CISA) — CISA #StopRansomware Guide › Preparing for Ransomware