Question: What is the primary purpose of the CAPIF-4 reference point in the context of 3GPP Northbound APIs?
Option 1: To establish secure connections between User Equipment (UE) and the network
Option 2: For the CAPIF core function to request API updates from the API publishing function
Option 3: To publish service API information by the API publishing function to the CAPIF core function
Option 4: To manage subscriber data privacy across different network domains
Explanation: The correct answer, Option 3, accurately reflects the primary purpose of the CAPIF-4 reference point. This reference point is utilized for the API publishing function to disseminate service API information to the CAPIF core function, facilitating API discovery and utilization within the network. The other options are incorrect because they describe unrelated functionalities (Option 1), reverse the intended communication direction (Option 2), or pertain to a different aspect of network management (Option 4).