An enterprise customer has these requirements: end-to-end QoS for the business-critical applications and VoIP services based on CoS marking. flexibility to offer services such as IPv6 and multicast without any reliance on the service provider. support for full-mesh connectivity at Layer 2.
Which WAN connectivity solution meets these requirements?
A. VPWS
B. MPLS VPN
C. DMVPN
D. VPLS
