ISC2 Systems Security Certified Practitioner (SSCP) Practice Question
An SME with limited tape capacity performs a 2 TB full backup of its on-prem file server each Friday night. The security administrator must capture changes every weekday, reduce the amount of data written compared to additional full backups, and ensure the shortest possible restore time if Thursday's data must be recovered. Which backup method should be scheduled for Monday through Thursday?
Nightly synthetic full backups created by merging the previous full with new changes.
Additional full backups each night, compressed and deduplicated to save space.
Incremental backups that record only the changes since the most recent backup of any type.
Differential backups that record all changes since the last full backup.
Differential backups copy every block that has changed since the last full backup. From Monday onward each differential is smaller than a full backup, so less data is written during the week. At restore time only the most recent full backup (Friday) and the latest differential (for example, Thursday) are needed, making recovery faster than an incremental chain, which would require restoring the full backup plus every individual daily incremental set. Synthetic full or daily full backups would write far more data, and daily incrementals, while space-efficient, extend recovery time because multiple backup sets must be processed in sequence.
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ISC2 Systems Security Certified Practitioner (SSCP)
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