Question: What is the primary purpose of the CAPIF-1 reference point between the API invoker and the CAPIF core function within a PLMN trust domain?
Option 1: To manage the lifecycle of service APIs, including deployment and versioning.
Option 2: To facilitate direct communication between User Equipment (UE) and the network's core functions.
Option 3: To handle billing and charging for API usage by invokers.
Option 4: To enable discovery, authentication, authorization, and onboarding/offboarding of API invokers.
Explanation: The CAPIF-1 reference point is designed to handle key security and management aspects for API invokers within a trusted domain, including discovering available service APIs, authenticating and authorizing access, and managing invoker onboarding and offboarding, ensuring secure and controlled API interaction.