Availability is the principle that deals with ensuring data is accessible when and where it is needed.

Availability is the principle that deals with ensuring data is accessible when and where it is needed.

• A. Availability
• B. Asset Value
• C. ALE
• D. BCP

Answer: (A)

Availability means information and systems are accessible to authorized users when they need them, with minimal or no downtime. In practice this requires designing for uptime and quick recovery: redundant hardware and networks, failover and load balancing, regular backups, geographically dispersed data centers, and tested disaster recovery and incident response plans. It’s a core part of the security landscape because even with strong confidentiality and integrity, data isn’t useful if it can’t be reached when needed; therefore, capacity planning, monitoring, and resilient architectures are all essential to keep services available. Asset Value focuses on how much an asset is worth and is used for prioritizing protection, not the ability to access data. ALE is a risk metric estimating expected annual losses, not the mechanism that keeps data accessible. A Business Continuity Plan outlines procedures to continue operations after disruptions and supports availability, but the specific principle described is Availability.