ABC Company has a WLAN controller with 10 controller-based APs; the Voice SSID is configured for centralized data forwarding. Each AP is connected to an
access port on a layer-2 Ethernet switch. Each layer-2 switch is uplinked to a single layer-3 core Ethernet switch. The WLAN controller is connected directly to the
layer-3 core Ethernet switch. Layer-3 tunnels are created between all controller-based APs and the WLAN controller. A voice server is connected to the layer-3
Ethernet switch.
When a voice-enabled QoS STA sends an IP data packet to a voice server in this scenario, the DSCP value carried in the STA’s IP data packet gets mapped to
what and by which device?

A.
The DSCP value is mapped to an IEEE 802.1Q priority tag value by the WLAN controller.

B.
The DSCP value is mapped to the DSCP value in the encapsulating IP header by the layer-3 switch.

C.
The DSCP value is mapped to an IEEE 802.1p (802.1D-2004) UP value by the access point.

D.
The DSCP value is mapped to an IEEE 802.1Q VLAN tag by the access point.