A network engineer must provide 40mb connections from the data center to the corporate office and two remote offices. What WAN connectivity option will outsource the routing in cooperation with the…

Question

Options

• AEthernet Private Line
• BEthernet Multipoint Service
• CMPLS VPN
• DVPLS

• A
  9% (4)
• B
  5% (2)
• C
  84% (36)
• D
  2% (1)

Explanation

MPLS VPN is the answer because it explicitly outsources the WAN routing function to the service provider. In an MPLS VPN architecture, the service provider operates Provider Edge (PE) routers that run MP-BGP to exchange customer VPN routes across the MPLS backbone. The customer only needs Customer Edge (CE) routers at each site and does not need to manage WAN routing between sites - the SP handles all of that. Ethernet Private Line (A) is a point-to-point Layer 2 service with no provider-managed routing. Ethernet Multipoint Service (B) is a Layer 2 multipoint service - the customer is still responsible for routing above Layer 2. VPLS (D) is also a Layer 2 service (virtual LAN over MPLS) that requires the customer to perform their own Layer 3 routing. Only MPLS VPN provides cooperative, SP-managed Layer 3 routing as part of the service.

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