Question: What is the primary purpose of the MCData-FD-1 reference point in the context of Mission Critical Data (MCData) as per 3GPP standards?
Option 1: To facilitate multicast data transmission for MCData services.
Option 2: To support MCData application signalling for establishing a session for file distribution, including related metadata and unicast data transfer.
Option 3: To manage Quality of Service (QoS) parameters for MCData bearer services.
Option 4: To enable direct communication between MCData clients without an MCData server.
Explanation: The correct answer, Option 2, accurately reflects the primary purpose of the MCData-FD-1 reference point as described in the context. It is specifically designed for MCData application signalling to establish sessions for file distribution, which includes handling metadata, URLs associated with files, download completion reports, and small-sized files. This aligns with the detailed functionalities attributed to the MCData-FD-1 reference point in the provided context, highlighting its crucial role in facilitating efficient and structured file distribution within Mission Critical Data communications.