In a robust backup policy, the rule to keep three copies of data, stored on at least two media types with one offsite copy, is known as what?

In a robust backup policy, the rule to keep three copies of data, stored on at least two media types with one offsite copy, is known as what?

• A. 3-2-1 Backup Rule
• B. Version Control
• C. Full Backup
• D. Incremental Backup

Answer: (A)

The principle being tested is data survivability through redundancy and diversity of storage. Keeping three copies of data ensures that if one copy is lost or corrupted, two others remain to restore from. Storing those copies on at least two different media types protects against a single media failure or aging hardware, so you’re not relying on one technology alone. Having one copy offsite protects against disasters that affect the primary location, like fire, flood, or a ransomware attack that targets local backups. In practice, you might keep the original data on primary storage, back it up to a local disk or NAS, and also keep a separate copy in the cloud or at another location. This combination minimizes the risk of total data loss and speeds recovery in various failure scenarios. Version control focuses on tracking changes to files over time rather than providing multiple independent backups. A full backup describes backing up all data in one operation, not the number of copies or media types. An incremental backup describes backing up only changes since the last backup, again focusing on backup scope and timing rather than the protection scheme across copies and locations.

The principle being tested is data survivability through redundancy and diversity of storage. Keeping three copies of data ensures that if one copy is lost or corrupted, two others remain to restore from. Storing those copies on at least two different media types protects against a single media failure or aging hardware, so you’re not relying on one technology alone. Having one copy offsite protects against disasters that affect the primary location, like fire, flood, or a ransomware attack that targets local backups. In practice, you might keep the original data on primary storage, back it up to a local disk or NAS, and also keep a separate copy in the cloud or at another location. This combination minimizes the risk of total data loss and speeds recovery in various failure scenarios.

Version control focuses on tracking changes to files over time rather than providing multiple independent backups. A full backup describes backing up all data in one operation, not the number of copies or media types. An incremental backup describes backing up only changes since the last backup, again focusing on backup scope and timing rather than the protection scheme across copies and locations.