Question: In a 5G System, when the Network Exposure Function (NEF) sends a Member UE Selection Assistance Notification to the Application Function (AF), what is expected from the AF upon successful receipt of the notification?
Option 1: The AF responds with an HTTP "200 OK" status code and echoes back the received MemUeSeletAssistNotif data structure.
Option 2: The AF sends a new HTTP POST request to the NEF to acknowledge the notification and request additional information.
Option 3: The AF shall send an HTTP "204 No Content" status code, indicating successful receipt without returning any content.
Option 4: The AF will initiate a retry mechanism to ensure the NEF receives the acknowledgement.
Explanation: Upon successfully receiving the Member UE Selection Assistance Notification from the NEF, the Application Function (AF) is expected to respond with an HTTP "204 No Content" status code. This response indicates that the request has been successfully processed by the AF, but there is no additional content to return in the response body, as per standard HTTP protocol behaviors in such scenarios.