Question: What is the primary purpose of the Ga reference point in the charging architecture?
Option 1: To support interaction between a CGF and a PGW.
Option 2: To enable communication between a CDF and an OCS.
Option 3: To facilitate interaction between a CDF and a CGF for CDR exchange.
Option 4: To provide a interface between a CDF and a SPR.
Explanation: The Ga reference point is specifically designed to support the interaction between a Charging Data Function (CDF) and a Charging Gateway Function (CGF), enabling the exchange of Charging Data Records (CDRs) and acknowledgments. This is crucial for charging management in telecom networks, as it allows for the efficient transfer of charging-related data between these functional entities.