QuestionQ129

Service Design

A business plans to modernize its legacy Frame Relay WAN. It currently has product specialists at each of its 200 branches, but intends to reduce and centralize those resources. Product specialists must be available by video link when customers visit branch offices nationwide. Which technology should be used to achieve this objective?

  • A DMVPN phase 1 network over the Internet
  • B Layer 3 MPLS VPN hub and spoke
  • C Layer 2 VPLS
  • D Layer 3 MPLS VPN full mesh
Explanation

A Layer 3 MPLS VPN hub-and-spoke design centralizes services at one or more hub sites while connecting each branch as a spoke. It provides the required branch-to-specialist video connectivity without the unnecessary any-to-any branch connectivity of a full mesh or Layer 2 VPLS service. Cisco documents that Layer 3 MPLS VPNs can implement hub-and-spoke topologies in which remote sites learn routes only from the central site.

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