Question: What does the `RTCP (1)` value of the Flow-Usage AVP indicate about an IP flow in a telecom network?
Option 1: The IP flow is used for transporting general internet browsing traffic.
Option 2: The IP flow is utilized for voice call signaling using SIP/SDP protocols.
Option 3: The IP flow's usage information is not being provided by the network.
Option 4: The IP flow is specifically used to transport Real-time Transport Control Protocol (RTCP) packets.
Explanation: In telecom networks, especially those utilizing IP Multimedia Subsystem (IMS) for multimedia services, understanding the usage of IP flows is crucial for efficient resource allocation and policy enforcement. The `RTCP (1)` value of the Flow-Usage AVP specifically indicates that an IP flow is dedicated to transporting RTCP packets. RTCP provides out-of-band statistics and control information for Real-time Transport Protocol (RTP) media streams, which are essential for Quality of Service (QoS) monitoring and management in real-time communication services like VoIP or video conferencing. Thus, identifying RTCP flows helps in prioritizing and managing these critical control packets within the network.