Question: What is the primary purpose of the CAPIF-5e reference point in the context of 3GPP Northbound APIs?
Option 1: To establish secure communication channels between User Equipment (UE) and the Public Land Mobile Network (PLMN)
Option 2: To manage service API, API invoker, and API provider domain function information between the API management function and the CAPIF core function
Option 3: To facilitate direct data transfer between different PLMN trust domains
Option 4: To authenticate 3rd party applications within the PLMN trust domain
Explanation: The correct answer, Option 2, accurately reflects the primary purpose of the CAPIF-5e reference point as defined in the context of 3GPP Northbound APIs. This reference point is utilized for the management of service API, API invoker, and API provider domain function information, specifically between the API management function (within a 3rd party trust domain) and the CAPIF core function (within the PLMN trust domain). This highlights its role in inter-domain management and coordination rather than direct user equipment communication, data transfer between PLMNs, or application authentication within a single domain.