Which of the following statements about VXLAN encapsulation is TRUE?

A: It uses an MPLS label to identify the transport tunnel and a VXLAN Network ID (VNI) to identify the service tunnel. B: It uses a VXLAN Network ID (VNI) to identify the transport tunnel and an MPLS label to identify the service tunnel. C: It uses an additional IP header to identify the transport tunnel and a VXLAN Network ID (VNI) to identify the service tunnel. D: It uses VXLAN Network ID (VNI) to identify the transport tunnel and an additional IP header to identify the service tunnel.