What is the primary purpose of the YANG language?

The YANG language is primarily designed for data modeling, which means it is utilized to define the structure, constraints, and semantics of data within network devices and applications. This capability allows for the representation of configuration and state data of networking devices in a standardized format. Additionally, YANG supports Remote Procedure Calls (RPCs), which enable operations to be invoked on network devices remotely.

By providing a syntax for creating models that interact with network devices, YANG facilitates easier network management and automation. It is closely associated with the NETCONF protocol, which uses YANG models to configure and operate network devices in a consistent manner. This makes it a powerful tool for network engineers looking to implement automation and orchestration within their networks.

Other provided choices do not capture the primary function of YANG. For instance, data analytics focuses on analyzing data for insights rather than modeling it, while network visualization pertains to graphical representations of network status or topology. Static routing is a networking concept related to routing protocols and doesn't align with the modeling aspects that YANG provides. Thus, data modeling and RPCs represent the core functionalities that make YANG an essential language in network management.