(ISC)2 Certified in Cybersecurity Practice Exam

What does the concept of defense in depth involve?

1. Using a single layer of strong protection

2. Implementing multiple layers of security

3. Applying only software security measures

4. Focusing only on physical security

The correct answer is: Implementing multiple layers of security

The concept of defense in depth involves implementing multiple layers of security to protect information systems. This strategy acknowledges that no single security measure is entirely foolproof. By layering various security controls—such as firewalls, intrusion detection systems, antivirus software, encryption, and physical security measures—an organization can create a more robust defense against potential attacks. If one layer fails or is breached, additional layers can still provide protection, thereby increasing the likelihood of thwarting unauthorized access or data breaches. This holistic approach helps ensure that vulnerabilities in one area do not compromise the overall security posture of the organization. It is a fundamental principle in cybersecurity that emphasizes the importance of redundancy and comprehensiveness in security planning.