Question: In an MCPTT (Mission Critical Push To Talk) scenario, when a media endpoint leaves an ongoing MCPTT call, what action does the Interworking Function (IWF) floor control server take regarding RTP media packets from that endpoint?
Option 1: The IWF continues to process and forward RTP media packets from the leaving endpoint to other participants.
Option 2: The IWF buffers RTP media packets temporarily in case the endpoint rejoins the call.
Option 3: The IWF sends an error message back to the leaving endpoint for each received RTP packet.
Option 4: The IWF discards RTP media packets received from the MCPTT media endpoint leaving the call.
Explanation: When an MCPTT media endpoint leaves a call that is still ongoing with other endpoints, the IWF floor control server's immediate action includes stopping the interaction with the leaving endpoint. This means it not only ceases sending floor control messages and RTP media packets to the endpoint but also discards any incoming traffic from it to maintain call integrity and resource allocation among remaining participants. This procedure ensures a clean disconnection and prevents unnecessary processing or potential security vulnerabilities.