Question: In a Policy and Charging Control (PCC) context, using the Flow-Description AVP for an IP flow, what is the implication of setting the "Direction" parameter to "out" regarding source and destination parameters in the packet filter?
Option 1: Source parameters correspond to the local (UE end), and destination parameters correspond to the remote parameters.
Option 2: Source parameters correspond to the remote parameters, and destination parameters correspond to the local (UE end) parameters.
Option 3: Both source and destination parameters are considered for matching packets in both directions (local and remote).
Option 4: The "out" direction setting is irrelevant to the correspondence of source and destination parameters.
Explanation: According to the specifications, when the "Direction" is set to "out", it indicates that the IPFilterRule's "source" parameters (in the Flow-Description AVP) correspond to the "remote" parameters in the packet filter, and the "destination" parameters correspond to the "local" (User Equipment, UE end) parameters. This setup is crucial for correctly filtering outgoing IP flows based on their source and destination attributes.