Question: What is the primary purpose of the Gw reference point in the Policy and Charging Control architecture?
Option 1: To establish and manage IP-CAN sessions between the User Equipment (UE) and the network.
Option 2: To facilitate communication between the PCEF and external Application Servers for service provisioning.
Option 3: To transport Policy Filter Definitions (PFDs) from the Policy and Charging Rules Function (PFDF) to the Policy and Charging Enforcement Function (PCEF).
Option 4: To handle billing and charging data exchange between the PCEF and the Online Charging System (OCS).
Explanation: The correct answer is Option 3 because it enables the transport of PFDs from the PFDF to the PCEF for policy enforcement, unlike managing IP-CAN sessions, communicating with external servers, or exchanging billing/charging data.