Question: What is the primary purpose of the SIP-2 reference point between the SIP core and the SIP Application Server (SIP AS) in supporting Mission Critical (MC) services?
Option 1: Exclusive use for media transfer in group communications
Option 2: Encompassing session management, security, and event notifications for MC service enablement
Option 3: Solely for User Equipment (UE) location updates to the MC service server
Option 4: Limited to multicast operation configuration only
Explanation: The SIP-2 reference point is utilized for a broad range of critical functions in supporting MC services, including session management, security and authentication measures, event subscription and notification, communication of Temporary Mobile Group Identity (TMGI) for multicast operations, and media negotiation, highlighting its importance in ensuring seamless and secure MC service delivery.