Question: What is the primary purpose of using the "EAP-5G" method in the Registration procedure via trusted non-3GPP access?
Option 1: To establish a secure connection between the UE and the TNGF.
Option 2: To encapsulate NAS messages between the UE and the AMF.
Option 3: To authenticate the UE using a vendor-specific EAP method.
Option 4: To reuse the existing UE security context in AMF for authentication.
Explanation: The "EAP-5G" method is used to encapsulate NAS messages, but its primary purpose in this context is to allow the UE to be authenticated by reusing the existing UE security context in AMF, making the registration process more efficient.