Question: In RTSP-based PSS (Packet-switched Streaming Service) with QoE (Quality of Experience) metrics, if a PSS server does not approve modifications made by a client to the QoE metrics, how should the negotiation proceed?
Option 1: The server immediately rejects the session setup.
Option 2: The client and server continue to re-negotiate until mutual agreement or a maximum of 4 round trips are reached.
Option 3: The client is forced to accept the server's original QoE metric settings.
Option 4: The negotiation process is paused for a predefined timeout before resuming.
Explanation: The client and server continue to re-negotiate until mutual agreement or a maximum of 4 round trips are reached.