Question: In what scenario are IMS Service tunneling mechanisms applicable for use over Restrictive Access Networks?
Option 1: When IP traffic to the IMS core traverses through both the Evolved Packet Core (EPC) and non-EPC networks.
Option 2: Exclusively when the Restrictive Access Network is a part of a 5G standalone deployment.
Option 3: Only for IMS services that require additional security beyond what the EPC provides.
Option 4: When IP traffic to the IMS core does not traverse through the Evolved Packet Core (EPC).
Explanation: This is correct because the tunneling mechanisms are specifically applicable when IP traffic destined for the IMS core bypasses the Evolved Packet Core (EPC), ensuring security and integrity of IMS services in non-EPC traversing scenarios.