Explanation:
The drag-and-drop answer follows the practical distinction between the YANG model families. IETF models are standards-based models intended to provide a common structure for widely implemented protocol and interface functions. OpenConfig models are vendor-neutral operational and configuration models developed for cross-vendor automation, with a strong focus on consistent telemetry and network state representation.
Cisco native models expose Cisco platform-specific capabilities and usually provide the deepest coverage for IOS XE, IOS XR, or NX-OS features that are not fully represented in a common model. The selected mapping therefore assigns model elements according to origin, portability, and feature depth. In a production automation design, engineers should start with open models when interoperability and long-term portability matter, but they should choose Cisco native models when a required Cisco feature is not available or is incomplete in IETF or OpenConfig. The choice is not cosmetic; it affects payload structure, namespace, validation behavior, and operational consistency across device families. Reference topics: YANG model families, IETF YANG, OpenConfig, Cisco native YANG, model-driven configuration.