Question: Which reference point is used for SMS transfer between the UE and the AMF via NAS in a 5G network?
Option 1: N8
Option 2: N1
Option 3: N20
Option 4: N21
Explanation: The correct answer is N1, as it is defined as the reference point for SMS transfer between UE and AMF via NAS. This interface enables the User Equipment (UE) to send and receive Short Message Service (SMS) messages over the Non-Access Stratum (NAS).