Certified Information Systems Auditor (CISA) — Question 641

Which of the following BEST enables system resiliency for an e-commerce organization that requires a low recovery time objective (RTO) and a low recovery point objective (RPO)?

Answer options

• A. Redundant arrays
• B. Mirrored sites
• C. Nightly backups
• D. Remote backups

Correct answer: B

Explanation

The correct answer is B, as mirrored sites provide real-time replication of data, ensuring that both RTO and RPO are minimized. Options A, C, and D do not meet the criteria as effectively; redundant arrays enhance performance and reliability but do not directly provide recovery objectives, nightly backups may lead to significant data loss between backups, and remote backups typically have longer recovery times due to data transfer.