Question: In a Lawful Interception (LI) scenario for VoIP calls, as per 3GPP security standards, what does the Payload within the VoIP-CC-PDU typically contain?
Option 1: Only the RTP packets exchanged between call participants.
Option 2: IP layer and below (e.g., TCP/IP, Ethernet framing).
Option 3: Packets including the IP layer and above (e.g., IP/UDP/RTP) for the intercepted VoIP call.
Option 4: Just the VoipLIC header information without any user-plane packets.
Explanation: In the context of Lawful Interception for VoIP calls, capturing the full scope of communication is crucial. The Payload within the VoIP-CC-PDU contains comprehensive data, including not just the application layer (RTP) but also the transport (UDP) and internet (IP) layers, ensuring all relevant information exchanged between call participants is intercepted.