Which component is focused on policy enforcement within a security system?

The correct answer is the Control Plane. This component plays a critical role in policy enforcement within a security system. It is responsible for managing the configuration and operational policies that govern how data is handled within the network. The Control Plane oversees the flow of information regarding security policies and the rules that dictate how resources are accessed and used.

In the context of network security, the Control Plane ensures that the security measures implemented are enforced consistently across the network. It manages user authentication, authorization, and roles, effectively determining who has access to what resources and under what conditions. By relying on policy definitions, it can proactively enforce security protocols and respond to compliance requirements.

In contrast, other options like the Data Plane focus primarily on the actual flow of user data across the network and do not enforce security policies directly. The Services Plane typically refers to functionalities and resources provided by services, while the Access Plane relates more to the points at which users or devices are authenticated and granted access, without necessarily overseeing the enforcement of broader policies. This distinction highlights the unique and integral role of the Control Plane in maintaining the integrity of security measures within a system.