Certified Information Systems Auditor (CISA) — Question 958

An IS auditor is reviewing the backup procedures in an organization that has high volumes of data with frequent changes to transactions. Which of the following is the BEST backup scheme to recommend given the need for a shorter restoration time in the event of a disruption?

Answer options

Correct answer: B

Explanation

The differential backup captures all changes made since the last full backup, allowing for faster restoration compared to incremental backups, which require multiple backup sets to restore. While mirror backups provide real-time copies, they do not offer historical recovery points like differential backups do. Full backups are comprehensive but take longer to complete and restore, making them less suitable for environments with high data change frequency.