What does the practice of defense in depth involve?

The practice of defense in depth involves layering multiple security measures to create a comprehensive security posture. This strategy is designed to protect systems and data by employing various defensive mechanisms at different levels, making it more challenging for attackers to exploit vulnerabilities. Each layer addresses different aspects of security, such as physical security, network security, application security, and data security. If one layer is breached, the subsequent layers provide additional barriers, thereby reducing the overall risk of a successful attack.

By utilizing a defense in depth approach, organizations can better mitigate threats, respond to incidents more effectively, and ensure that they have multiple lines of defense against potential breaches. This multi-layered strategy reflects an understanding that no single security measure can provide complete protection and emphasizes the importance of redundancy and diversity in security practices.