Exam ZDTE Topic 1 Question 18 Discussion

Zscaler's core architecture in the Engineer course is explained using three main layers: Central Authority, Enforcement Nodes, and Logging / Nanolog services, supported by a distributed data fabric. The Central Authority is explicitly described as the "brains" or control plane of the Zscaler platform. It is responsible for global policy management, configuration, orchestration, and the API gateway that exposes Zscaler's administrative and automation APIs.
Enforcement nodes (such as ZIA Public Service Edges and ZPA enforcement components) form the data plane, inspecting traffic and applying policy decisions but not hosting the management APIs themselves.
Nanolog clusters handle large-scale log storage and streaming, providing logging and analytics rather than control or configuration interfaces. The data fabric underpins global state and synchronization across the cloud but is not where customers interact with APIs.
In the Digital Transformation Engineer material, when you see references to OneAPI and other programmatic integrations, they are always associated with the Central Authority layer, reinforcing that APIs live in the control plane. Therefore, within the defined Zscaler Architecture levels, the APIs sit at the Central Authority.