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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 option meets these requirements?
Correct Answer: D
VPLS provides full mesh connectivity at Layer 2. Cos marking will be kept in the frames because it transits on layer 2 network.