Question: What is the primary purpose of the Nnef_NIDD_Delivery service operation in the 5G System?
Option 1: To establish a secure connection between NF consumer and NEF.
Option 2: To deliver structured data between NF consumer and NEF.
Option 3: To deliver unstructured data between NF consumer and NEF to support NIDD via NEF.
Option 4: To manage user authentication and authorization.
Explanation: The correct answer is Option 3 because the Nnef_NIDD_Delivery service operation is specifically designed to deliver unstructured data between NF consumer and NEF, which supports Network Identity and Discovery (NIDD) via NEF. This is evident from the description of the service operation, which highlights its role in delivering unstructured data to support NIDD.