Question: Which of the following is NOT a primary function of the MCData-DS-1 reference point in the context of Mission Critical Data (MCData) communications?
Option 1: Transporting SIP signalling for MCData application via SIP-1 and SIP-2 reference points
Option 2: Exchanging metadata of the data being streamed between MCData clients and server
Option 3: Establishing bearer for uplink and downlink unicast stream download reports
Option 4: Managing Core Network (CN) mobility for MCData User Equipment (UE)
Explanation: The MCData-DS-1 reference point is specifically defined for application signalling, data streaming support, and related metadata exchanges. It does not directly involve managing Core Network (CN) mobility for MCData User Equipment (UE), a broader network functionality typically handled by other components within the telecom infrastructure.