Question: What is released during the PDU Session Release procedure in the 5G System?
Option 1: Only the IP address allocated for an IP-based PDU Session.
Option 2: Only the UPF resource used by the PDU Session.
Option 3: All resources associated with a PDU Session, including IP address/Prefixes, UPF resource, and access resource.
Option 4: Only the N19 termination resource.
Explanation: The PDU Session Release procedure releases all resources associated with a PDU Session. This includes the release of IP address/Prefixes allocated for an IP-based PDU Session, any UPF resource used by the PDU Session (including N3/N9/N19 termination), and any access resource used by the PDU Session.