Question: In a 3GPP-compliant network, when a Detach or PDN disconnection is detected over Mobile IPv4 at the Packet Data Network Gateway, what type of event is generated and sent to the Delivery Function 2?
Option 1: Location Update Request
Option 2: Authentication Failure Alert
Option 3: MIP Deregistration/Tunnel Deactivation Event
Option 4: Handover Completion Notification
Explanation: This event reflects the protocol's behavior for managing UE mobility and session management when a Detach or PDN disconnection occurs, updating the UE's location and connectivity status for seamless lawful interception capabilities.