Question: What is the primary purpose of the Nsmf_PDUSession_Release service operation in the 5G System (5GS)?
Option 1: To establish a new PDU Session.
Option 2: To modify existing resources associated with a PDU Session.
Option 3: To request additional resources for a PDU Session.
Option 4: To cause the immediate and unconditional deletion of resources associated with a PDU Session.
Explanation: The Nsmf_PDUSession_Release service operation is used to release resources related to a PDU Session, which is essential in scenarios such as implicit De-registration of UE in the serving network. This operation ensures that resources are freed up immediately and unconditionally, making them available for other uses within the 5GS network.