Question: How do NG-RAN nodes inform their neighbours about the list of supported CAG ID(s) per CAG cell?
Option 1: Through S1 interface management procedures
Option 2: Through Xn interface management procedures
Option 3: Through F1 interface management procedures
Option 4: Through N2 interface management procedures
Explanation: NG-RAN nodes inform their neighbours about the list of supported CAG ID(s) per CAG cell through Xn interface management procedures, as specified in the 3GPP TS 38.300 standard. This allows for efficient self-configuration and neighbour discovery between NG-RAN nodes.