Question: What is the primary purpose of the Nnef_AF_request_for_QoS_Update service operation in the 5G System?
Option 1: To request a new IP address for a UE.
Option 2: To update the Service Requirement(s) and/or additional Alternative Service Requirement(s) for a UE or a group of UEs.
Option 3: To retrieve the current QoS parameters for a specific flow.
Option 4: To notify the network about a change in the UE's location.
Explanation: The Nnef_AF_request_for_QoS_Update service operation is used by the consumer to request the network to update the Service Requirement(s) and/or additional Alternative Service Requirement(s) for a UE or a group of UEs. This allows the network to adjust the QoS parameters accordingly, ensuring that the UE receives the required level of service.