Which of the following describes a layered defense principle?

The concept of a layered defense principle, also known as defense in depth, centers on the idea of implementing multiple security measures at various points in a system to protect against threats. The choice that describes this principle accurately presents the scenario where an attacker, upon breaching the first layer of defense, must then confront other diverse defense mechanisms that serve as barriers to further infiltration.

By incorporating a range of defenses—such as firewalls, intrusion detection systems, and access controls—a layered defense strategy ensures that even if a single layer is compromised, additional defenses remain intact to thwart the attacker. This strategy increases the overall security posture and makes it more challenging for adversaries to access sensitive systems or data.

The other options do not effectively convey the essence of layered defense. While some may mention aspects of defense or counterattack, they do not accurately represent the multifaceted barriers that are integral to a comprehensive security strategy.