Distinguish that a basic tenet of security architectures is layered implementation of security. Thus, an organization must establish multiple layers of security controls and safeguards, which can be organized into policy, training and education, and technologies, as shown in the CNSS model presented in the first module.
Demonstrate that to achieve defense in depth, an organization must establish multiple layers of security controls and safeguards, which can be organized into policy, training and education, and technology.
Recall that while policy may not prevent attacks, it prepares the organization to handle them, and coupled with other layers, it can deter attacks.
Implementing multiple types of technology and thereby preventing the failure of one system from compromising the security of information is referred to as redundancy.