Which level is NOT one of the three network levels in automation?

In the context of automation systems, the three primary network levels typically include the Field device level, the Automation and control level, and the Enterprise level. These levels represent the hierarchy of control and data flow in an automated environment, from raw data collection to high-level decision making and enterprise management.

The Field device level encompasses actual sensors and actuators that interact with the physical processes. The Automation and control level includes controllers and software that manage and optimize the operational process. Finally, the Enterprise level facilitates overarching management, data storage, and analytical functions, integrating information across the organization for strategic decision-making.

The reference to "Server Management" does not align with these established automation hierarchy levels. While server management is an important aspect of IT infrastructure and may support various applications within an enterprise environment, it is not categorized as one of the core network levels in automation systems. Thus, it is identified as the option that is not part of the three network levels in automation.