"Security in depth" refers to a:

Security in depth is a layered defense strategy involving multiple barriers to protect assets. This approach ensures that the failure of one barrier does not compromise the entire system.

Layered Defense:

Security in depth employs multiple layers of protection, such as physical barriers, access controls, surveillance, and response protocols.

Purpose:

Delays intruders, providing time for detection and response.

Increases the difficulty of bypassing security, reducing overall risk.

Examples:

Perimeter fencing, access control systems, surveillance cameras, and secure locks.

Each layer complements the others to form a robust defense.

A: Security in depth focuses on preventing penetration, not determining its extent.

C: While redundancy is often a component, it does not define security in depth.

D: Security in depth may incorporate CPTED concepts but is not synonymous with it.

Key Elements:Why Other Options Are Incorrect:ASIS CPP® References:

Domain 5: Physical SecurityDiscusses layered security measures as a core element of physical protection plans.