Question: In a PSS (Transparent end-to-end Packet-switched Streaming Service) scenario, when does the PSS server change the SSRC (Synchronization Source) value for a specific P session after a fast content switching operation?
Option 1: Always, regardless of media codec configuration or payload type.
Option 2: Only if the payload type of the old and new media streams is different.
Option 3: If the client has not requested features related to SSRC usage.
Option 4: If the payload type of the old and new media streams is the same but the media codec configuration is different, or if the mapping of the new media stream is otherwise unknown to the PSS client.
Explanation: This option correctly identifies the conditions under which the PSS server must change the SSRC value after a fast content switch. Changing the SSRC ensures proper synchronization in cases where either the codec configuration differs (despite the same payload type) or when the new stream's mapping is unknown to the client, preventing potential desynchronization issues.