Question: What is the primary purpose of the MCData-DS-3 reference point in the context of Mission Critical Data (MCData) communication?
Option 1: To establish a unicast connection between the MCData server and multiple MCData clients.
Option 2: To enable the multicast transmission of data streams from the MCData server to the DS function of MCData clients.
Option 3: To manage the authentication process for MCData services between the server and client.
Option 4: To provide a feedback loop for Quality of Service (QoS) adjustments in MCData transmissions.
Explanation: The correct answer, Option 2, accurately reflects the role of the MCData-DS-3 reference point. It facilitates multicast data stream transmission from the MCData server to the DS function of the MCData client, which is crucial for efficient dissemination of critical data in mission-critical scenarios with multiple recipients. The other options misrepresent this purpose, suggesting unicast, unrelated processes like authentication, or post-transmission adjustments.