Question: What is the primary purpose of the Routing-Rule-Remove AVP (AVP code 1075) in a Policy and Charging Control (PCC) context, specifically regarding IP CAN sessions?
Option 1: To remove IP flow mobility routing rules or NBIFOM routing rules from the PCRF for an IP CAN session.
Option 2: To add new IP flow mobility routing rules to the PCRF for enhanced session management.
Option 3: To modify existing Quality of Service (QoS) parameters for ongoing IP CAN sessions.
Option 4: To request routing rule updates from the PCRF for roaming subscribers.
Explanation: The correct answer is Option 1 because the Routing-Rule-Remove AVP is specifically designed to remove (as indicated by its name) either IP flow mobility routing rules or NBIFOM routing rules that were previously defined at the Policy and Charging Rules Function (PCRF) for an IP Connectivity Access Network (IP CAN) session. This action directly impacts how traffic is routed for these sessions, aligning with the AVP's intended use as described in the context of PCC operations.