When differentiating between IETF.

OpenConfig separates intended configuration from operational state by using separate config and state containers, while many IETF and Cisco native models use a single hierarchy for configuration and operational data or expose operational data differently. This distinction is important in automation because the client must know whether it is writing desired configuration or reading actual device state. OpenConfig’s structure was designed to provide consistent multivendor modeling, with configuration data placed under config containers and observed state under state containers. Cisco native models tend to mirror the Cisco device CLI and feature hierarchy more closely, while IETF models focus on standards-based interoperability. Option B correctly states the contrast presented in the question. Option A reverses the relationship. Option C incorrectly assigns split containers to IETF and native models. Option D incorrectly isolates Cisco native models as the only split-container style. Reference topics: YANG model structure, OpenConfig config and state containers, IETF YANG, Cisco native models, network automation data modeling.