The most effective way to minimize the impact of a control failure is to employ Defense in Depth, which involves:

Layered Security Controls: Implementing multiple, overlapping security measures to protect assets.

Redundancy: If one control fails (e.g., a firewall), others (like IDS, endpoint protection, and network monitoring) continue to provide protection.

Minimizing Single Points of Failure: By diversifying security measures, no single failure will compromise the entire system.

Adaptive Security Posture: Layered defenses allow quick adjustments and contain threats.

Other options analysis:

A . Business continuity plan (BCP): Focuses on maintaining operations after an incident, not directly on minimizing control failures.

B . Business impact analysis (BIA): Identifies potential impacts but does not reduce failure impact directly.

D . Information security policy: Guides security practices but does not provide practical mitigation during a failure.

CCOA Official Review Manual, 1st Edition Reference:

Chapter 7: Defense in Depth Strategies: Emphasizes the importance of layering controls to reduce failure impacts.

Chapter 9: Incident Response and Mitigation: Explains how defense in depth supports resilience.