What approach does "defense in depth" recommend against cyber threats?

"Defense in depth" is a comprehensive security strategy that advocates for multiple overlapping layers of protection to safeguard against cyber threats. This approach recognizes that no single security measure is foolproof and that attackers often exploit vulnerabilities in any given layer of security. By employing a variety of defenses—such as firewalls, intrusion detection systems, anti-virus software, encryption, and user training—organizations can create a more resilient security framework. Each layer serves as a barrier that not only protects against various types of attacks but also provides additional time and opportunities to detect breaches should they occur.

In this context, relying solely on a single security technology or focusing predominantly on one aspect of security, such as network-level defenses, is insufficient. These methods may leave critical gaps in security, making systems more vulnerable to advanced threats. Additionally, continuous auditing without user input overlooks the importance of human factors and can lead to non-compliance or overlooked vulnerabilities due to a lack of proper context regarding user interactions with systems. Thus, implementing multiple overlapping layers ensures a more robust defense against diverse threats, embodying the essence of the "defense in depth" strategy.