Question: In an MCPTT (Mission Critical Push To Talk) system, when the IWF (Interworking Function) sends a Floor Ack message towards the floor control server with the controlling function in the MCPTT system, what is a mandatory component of the Track Info field in this message?
Option 1: Permanent User ID
Option 2: Group Communication Identifier
Option 3: LMR (Land Mobile Radio) System ID
Option 4: Temporary Identifier as the first <Floor Participant Reference> value
Explanation: In the context of MCPTT media plane control interworking with LMR systems, when the IWF sends a Floor Ack message to the floor control server within the MCPTT system, it is crucial for managing floor control and participant tracking that the message includes a temporary identifier. This identifier, serving as the first <Floor Participant Reference> value in the Track Info field, enables efficient management of floor requests and grants among participants, ensuring orderly communication in mission-critical scenarios.