Question: What is a key aspect of the Gx reference point between the PCEF and PCRF, specifically in the context of convergence between 3GPP access and Broadband Forum access networks?
Option 1: It exclusively provisions IP flow mobility routing information from PCEF to PCRF.
Option 2: It enables the transfer of PCC rules for an IP-CAN session for both fixed devices and 3GPP UEs.
Option 3: It mandates the negotiation of IP-CAN bearer establishment mode (UE-only or UE/NW) between PCEF and PCRF.
Option 4: It restricts the application of PCC rules to only 3GPP UEs, excluding fixed devices.
Explanation: The correct answer highlights a crucial functionality of the Gx reference point in facilitating convergence between different access networks. This aspect is vital for unified policy and charging control across heterogeneous networks, ensuring seamless application of PCC rules regardless of whether the device is a fixed broadband device or a mobile 3GPP UE.