Question: In managing an MBS User Data Ingest Session via the NEF, what role does the NEF play specifically for MBS group message delivery as per 3GPP specifications?
Option 1: The NEF acts as a proxy between the trusted DN and external AF.
Option 2: The NEF plays the role of an Application Function (AF) itself.
Option 3: The NEF is bypassed in favor of direct MBSF-AF communication.
Option 4: The NEF only manages session status subscriptions for this feature.
Explanation: For MBS group message delivery, the Network Exposure Function (NEF) takes on the role of an Application Function (AF), establishing and managing the related MBS User Data Ingest Session, highlighting its versatility in supporting various service delivery models within the 5G system architecture.