Question: What primary measure is employed to secure the IRP (Interface for Revenue Protection) interface in Subscription Management (SuM) architecture?
Option 1: Implementing proprietary encryption protocols across all data exchanges.
Option 2: Controlling access to the network and management systems, ensuring only authorized personnel can retrieve or alter SuM data.
Option 3: Utilizing standard protocols with inherent security features for IRPManager and IRPAgent communication.
Option 4: Securing physical links between IRPManager and IRPAgent with firewalls.
Explanation: The correct answer highlights the primary focus on access control to secure the IRP interface. This approach ensures that only authorized personnel can interact with SuM data, providing a foundational layer of security. While standard protocols and securing physical links contribute to overall security, they are secondary or complementary measures. Proprietary encryption protocols are not specified as the primary security measure.