Which programming model is vendor-agnostic and combines operational and configuration data in the same container?

While YANG is a data modeling language and can be used for open models, 'open YANG' is not a specific programming model that inherently defines the combination of operational and configuration data in the way OpenConfig does.

Native YANG models are typically vendor-specific extensions and therefore are not vendor-agnostic, directly contradicting one of the key requirements.

IETF is a standards organization that develops various protocols and data models, including some YANG models, but it is not a programming model itself that specifically combines operational and configuration data in the same container across vendors.

OpenConfig is an industry-wide initiative that uses YANG data models to provide a vendor-agnostic way to configure and monitor network devices. A key feature of OpenConfig models is their design to unify configuration and operational state data within the same logical data structure, simplifying network automation and management by offering a consistent view across different vendors.