Question: What is the primary purpose of the 'Restoration' function within the M3 interface management functions in E-UTRAN?
Option 1: To handle protocol errors and indicate them to the relevant network elements.
Option 2: To ensure a synchronized start of the M3 interface operation across all connected nodes.
Option 3: To manage different versions of application part implementations for backward compatibility.
Option 4: To restore MBMS (Multimedia Broadcast Multicast Services) sessions after an MCE (Mobility Management Entity) or M3 path failure.
Explanation: The Restoration function is specifically designed to recover from failures that impact ongoing services. In the context of E-UTRAN and the M3 interface, its primary purpose is to restore MBMS sessions after a failure occurs, either at the MCE or along the M3 path, ensuring minimal disruption to broadcast/multicast services.