Certified Information Systems Auditor (CISA) — Question 663

Which of the following yields the HIGHEST level of system availability?

Answer options

• A. Backups
• B. Real-time replication
• C. Cloud storage
• D. Hot swaps

Correct answer: B

Explanation

Real-time replication offers the highest level of system availability because it continuously copies data to a secondary location, ensuring immediate failover in case of failures. Backups, while essential, do not provide real-time data protection and may result in data loss. Cloud storage and hot swaps improve availability but do not match the immediacy of real-time replication.