Question: What is the primary purpose of the Access Network Identity in a trusted non-3GPP access network used by the UE to access EPS?
Option 1: To authenticate the UE's identity
Option 2: To authorize the UE's access to the EPS
Option 3: To identify the access network as an input parameter for EPS security procedures
Option 4: To encrypt data transmission between the UE and the access network
Explanation: The Access Network Identity is used to identify a trusted non-3GPP access network, which is then used as an input parameter in the EPS security procedures. This ensures that the access network is authenticated and authorized before allowing the UE to access the EPS.