Question: In a SIP-based IMS (IP Multimedia Subsystem) session, what information does the Session-ID contain according to telecom standards for charging data description?
Option 1: The IP address of the served party
Option 2: The SIP Call ID as defined in the Session Initiation Protocol
Option 3: Service-specific data for billing purposes
Option 4: The type of service (e.g., voice, video, data)
Explanation: In the context of SIP sessions within an IMS, the Session-ID contains the SIP Call ID. This is crucial for accurately identifying and managing individual sessions for charging purposes, as outlined in telecom management standards. The SIP Call ID serves as a unique identifier for each session, facilitating precise tracking and billing.