Which strategy best describes "defense in depth" in cybersecurity?

"Defense in depth" is a fundamental cybersecurity strategy that refers to implementing multiple layers of security measures to protect systems and data. This approach is designed to ensure that if one layer of defense is penetrated, additional layers will still provide protection, reducing the overall risk of a successful attack.

By utilizing various security measures such as firewalls, intrusion detection systems, multi-factor authentication, and employee training on security awareness, organizations create a robust defense that can mitigate risks from different types of threats. Each layer addresses specific vulnerabilities and collectively enhances the overall security posture.

In contrast, options that suggest a single layer of defense or relying solely on specific measures like strict password policies or antivirus software fail to provide comprehensive protection. Cyber threats can be sophisticated and vary widely, making it critical to have multiple overlapping security measures in place rather than depending on a single point of defense. Therefore, the strategy of employing multiple layers of defense is what truly encapsulates the essence of "defense in depth."