Which concept involves duplication of data to prevent loss?

Which concept involves duplication of data to prevent loss?

• A. Capability List
• B. Security Labels
• C. Need-to-Know Principle
• D. Redundancy

Answer: (D)

Redundancy is the idea of duplicating data or systems so that a failure in one part doesn’t lead to loss of information. By keeping extra copies across multiple devices, servers, or locations, you can recover data from another copy if the primary becomes unavailable, corrupted, or destroyed. This directly protects against data loss and supports fault tolerance and continuity, with practical forms like backups, RAID, and geo-replication. The other concepts focus on who can access data or how data is labeled and classified, not on creating duplicate copies to prevent loss.

Redundancy is the idea of duplicating data or systems so that a failure in one part doesn’t lead to loss of information. By keeping extra copies across multiple devices, servers, or locations, you can recover data from another copy if the primary becomes unavailable, corrupted, or destroyed. This directly protects against data loss and supports fault tolerance and continuity, with practical forms like backups, RAID, and geo-replication. The other concepts focus on who can access data or how data is labeled and classified, not on creating duplicate copies to prevent loss.