Question: What is the primary purpose of the Nsmf_PDUSession_TransferMOData service operation in the 5G System (5GS)?
Option 1: To establish a new PDU session between the UE and the network.
Option 2: To forward MO Small Data from the V-SMF/I-SMF to the (H-)SMF.
Option 3: To release an existing PDU session due to inactivity.
Option 4: To modify the QoS parameters of an ongoing PDU session.
Explanation: The Nsmf_PDUSession_TransferMOData service operation is used by the V-SMF/I-SMF to forward MO Small Data received from the AMF to the (H-)SMF, allowing for efficient handling of small data transmissions in the 5GS network.