When creating network diagrams, which model is suggested to follow?

The Purdue model is widely recommended for creating network diagrams, particularly in the context of industrial control systems and operational technology. This model provides a structured approach to organizing and understanding the different layers of a network, particularly in environments that integrate IT (Information Technology) and OT (Operational Technology).

The Purdue model delineates a multi-layered architecture, which helps in visualizing the interaction between various components within a network, from the enterprise level down to the control layer. By categorizing the layers—such as the enterprise, DMZ (Demilitarized Zone), and control levels—this model facilitates clearer communication, better security practices, and more effective risk assessments. It is particularly useful for identifying where certain security measures, data flows, and controls should be implemented to protect the network effectively.

This structured framework allows for more effective assessment of vulnerabilities and potential risks, making it essential for professionals in the field of risk assessment and network security. In contrast, other models like those from Yale and Stanford do not specifically focus on the intricacies of network architecture in the same way, which is why they are not as commonly recommended for this purpose.