Question: What is the primary authentication method supported by the Security Anchor Function (SEAF) in a 5G system?
Option 1: IMSI
Option 2: SUPI
Option 3: GUTI
Option 4: SUCI
Explanation: The SEAF is responsible for providing authentication functionality, and it supports primary authentication using Subscription Concealed Identifier (SUCI), which is a privacy-preserving identifier.