Question: What mechanism can be used to prevent UEs from accessing a Public Network Integrated Non-Public Network (PNI-NPN) via a cell where they are not allowed, considering network slicing does not provide this functionality?
Option 1: Dedicated DNNs
Option 2: Network Slice instances allocated for the NPN
Option 3: Closed Access Groups (CAG)
Option 4: S-NSSAI configuration
Explanation: Closed Access Groups (CAG) can be used to apply access control and prevent UEs from accessing a PNI-NPN via a cell where they are not allowed. CAG identifies a group of subscribers who are permitted to access one or more CAG cells associated with the CAG, ensuring that only authorized UEs can access the network.