Question: In a DASH-over-MBMS scenario, when a client receives an HTTP 404 response for a requested segment, and the segment URL was calculated from the MPD (Media Presentation Description), what could be the primary interpretations of this response, considering the client's time is synchronized with the server's time?
Option 1: The segment is permanently removed from the server, and the client should update its MPD.
Option 2: The segment unavailability is likely due to a non-reparable transport error or segment loss during broadcast.
Option 3: The server is experiencing temporary technical difficulties, and the client should retry the request after a short interval.
Option 4: The client's device is not authorized to access the requested segment, and authentication is required.
Explanation: In DASH-over-MBMS, with synchronized client-server time and correctly calculated segment URL from MPD, the most plausible reason for segment unavailability is a non-reparable transport error or segment loss during broadcast. This aligns with broadcast environment challenges where missed segments cannot be retransmitted through the broadcast channel.