Designing Cisco Enterprise Networks (ENSLD) — Question 148

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?

Answer options

• A. VPWS
• B. MPLS VPN
• C. DMVPN
• D. VPLS

Correct answer: D

Explanation

The correct answer is VPLS, as it provides a Layer 2 full-mesh architecture and can support QoS for critical applications along with multicast and IPv6 services without depending on the service provider. VPWS does not offer full-mesh connectivity, MPLS VPN primarily operates at Layer 3, and DMVPN is not designed specifically for Layer 2 services.