Question: In correlating IMS IRI with GSN CC at the LEMF for multimedia communication scenarios, what is the primary reason SDP content within SIP signaling is necessary for decoding media streams?
Option 1: To identify participants in a SIP session other than the target.
Option 2: To provide encoding information not available in RTP header packets.
Option 3: To simplify the search for matching PDP context identifiers.
Option 4: To correlate charging information across different network entities.
Explanation: The correct answer is Option 2 because SDP content within SIP signaling may provide essential encoding information not available in RTP header packets, crucial for decoding media streams.