What does the principle of "segmentation" refer to in network security?

The principle of "segmentation" in network security emphasizes dividing a network into smaller, manageable parts or segments. This practice provides enhanced security by limiting access to specific segments based on user roles and permissions. By doing so, if a security breach occurs in one segment, the damage can be contained within that segment, preventing the threat from spreading to the entire network. Segmentation also aids in controlling traffic, applying security policies more effectively, and monitoring network activities to detect potential threats more easily.

Other options represent concepts that do not align with the principle of segmentation. For example, combining networks for efficiency could lead to increased risk exposure, as it would negate the protective benefits of segmentation. Monitoring network traffic is a valuable activity but is more related to intrusion detection rather than segmentation itself. Allowing unrestricted access to all users directly contradicts the intent of segmentation, which focuses on restricting access and controlling who can communicate within different network segments to improve overall security.