Question: Which of the following O&M (Operations and Maintenance) functions are typically expected to be supported by the NG-RAN's interface to the management plane, as per standard telecom practices?
Option 1: Security Authentication Protocols, User Data Encryption Management
Option 2: Performance Monitoring Functions, Alarm Status Reporting Functions, Synchronisation Source Management
Option 3: Radio Resource Allocation, Handover Decision Management, QoS Policy Enforcement
Option 4: Billing and Charging Control, Subscriber Profile Management, Service Provisioning
Explanation: In the context of telecom network management, particularly for NG-RAN, the management plane interface typically focuses on ensuring the network's operational health and efficiency. Performance Monitoring Functions help in tracking network performance metrics. Alarm Status Reporting Functions are crucial for fault management, notifying about issues. Synchronisation Source Management is vital for maintaining accurate timing across the network, which is essential for coherent wireless communications. These functions align with standard O&M practices aimed at maintaining network reliability and efficiency.