Cisco Enterprise Network Core Technologies (ENCOR) Practice Exam

RESTCONF uses YANG models for configuration because YANG is specifically designed to model data for network devices in a systematic way. It provides a formal structure for defining the data that can be configured and monitored on a device, making it highly suitable for use with RESTful APIs. In the context of RESTCONF, YANG models enable the representation of data structures that can be efficiently manipulated through HTTP requests.

YANG's advantages include its ability to define not only the data format but also the constraints and relationships between different data entities, which are crucial when working within complex network configurations. This model aligns well with REST principles, allowing for a clear interface between clients and servers that interact over the network.

The other options may represent different technologies or formats used in networking, but they do not serve the primary purpose of defining configuration models in RESTCONF. XML schemas, for example, are more suited for XML data formats but do not provide a specific mechanism for defining the operational state and configurations of networked devices like YANG does. JSON strings can be used to carry data but do not inherently define the structure or semantics of that data. HTML documents are focused on markup for web pages and are not applicable to device configuration management in this context.