Question: Upon receiving a Floor Request message from an MCPTT (Mission Critical Push To Talk) client, what actions does the floor participant interface toward the MCPTT client undertake?
Option 1: It changes to 'P: has permission' state and sends an acknowledgement to the MCPTT client.
Option 2: It sends the Floor Request message to the floor control server interface and remains in the 'P: has no permission' state.
Option 3: It rejects the Floor Request if the MCPTT client is not authenticated and then sends a notification to the floor control server.
Option 4: It immediately grants floor access to the MCPTT client without consulting the floor control server.
Explanation: This correct action ensures proper protocol for handling Floor Request messages. By sending the message to the floor control server, it allows for centralized management and decision-making regarding floor access. Remaining in the 'P: has no permission' state until further instruction from the floor control server prevents unauthorized access, maintaining the integrity of the communication session, crucial in Mission Critical communications for coordinated operations.