Question: What is the primary purpose of the API publishing function in the context of 3GPP Northbound APIs?
Option 1: To handle authentication for API invokers across different network domains.
Option 2: To manage the lifecycle of service APIs for internal network optimization.
Option 3: To facilitate the discovery of service APIs by publishing their information to the CAPIF core function.
Option 4: To monitor and analyze the usage patterns of published service APIs.
Explanation: The correct answer, Option 3, aligns with the described functionality of the API publishing function, which is to enable the discovery of service APIs by making their information available (published) to the CAPIF core function for access by API invokers. This highlights its role in facilitating interoperability and usability within telecom networks by ensuring that API capabilities are readily discoverable.