Question: In a Fixed Broadband Access network, how is Quality of Service (QoS) supported for applying QoS and charging policies per Service Data Flow (SDF), given the absence of traditional bearer concepts?
Option 1: DSCP (Differentiated Services Code Point) marking on the transport network layer
Option 2: Multiple EPS Bearers as defined in E-UTRAN access
Option 3: Policy and Charging Control (PCC) rules applied directly at the User Equipment (UE)
Option 4: Dedicated QoS servers within the Fixed Broadband Access network
Explanation: In the context of Fixed Broadband Access networks, where traditional bearer concepts are not supported, DSCP marking plays a crucial role. It enables QoS support on the transport network layer, allowing for the application of QoS and charging policies on a per-SDF basis. This approach effectively bridges the gap left by the absence of bearer-based QoS management, ensuring differentiated service treatment can still be applied as needed across the network.