Which component acts as the primary interface between VEN, PCE web interface, and third-party applications?

The REST API serves as the primary interface that facilitates communication between the Virtual Enforcement Node (VEN), the Policy Control Engine (PCE) web interface, and any third-party applications. It allows these components to exchange data and control policies programmatically.

By providing a standardized way for different components and applications to interact, the REST API enables the centralized management of security policies and ensures that the VEN can effectively enforce those policies on the workloads it monitors. This flexibility is particularly important in environments where integration with other tools and systems is necessary for comprehensive security management. Utilizing a REST API makes it easier for developers to build applications that can manipulate or retrieve data from the Illumio platform, thereby enhancing the overall functionality and adaptability of security measures within an organization.

Other components, such as the Policy Control Engine and Virtual Enforcement Node, do not directly provide this interface for external applications; instead, they primarily serve specific roles in the policy management and enforcement processes within the Illumio architecture.