The CTO of a company requires the support of a network consultant to deliver an MPLS solution without resigning to a certain degree of redundancy and scalability.
Which solution effectively scales to hundreds or thousands of sites?
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A. B. C. D.D.
To deliver an MPLS solution with redundancy and scalability to support hundreds or thousands of sites, the recommended solution is D. L3 VPN using a hierarchical topology of N-PEs and U-PEs.
L2 VPN with the broadcast traffic processed at the ingress P (Option A) does not provide scalability and redundancy, as it requires processing of broadcast traffic at the ingress P, which can cause performance issues and does not provide a redundant topology.
L3 VPN with direct LSP connectivity between all PEs (Option B) can provide scalability, but it may not provide redundancy, as it can create a complex mesh of LSPs that can be difficult to manage and maintain.
L2 VPN by encapsulating multiple frame formats with interworking (Option C) provides support for different frame formats, but it does not provide a scalable and redundant topology, as it relies on processing at the ingress P.
L3 VPN using a hierarchical topology of N-PEs and U-PEs (Option D) provides scalability and redundancy by using a hierarchical network topology. In this topology, the network is divided into multiple levels, with N-PEs at the core and U-PEs at the edge. The N-PEs are responsible for providing connectivity between the U-PEs, while the U-PEs are responsible for connecting to the customer sites. This topology allows for a scalable and redundant solution by enabling the distribution of the load and providing alternate paths in case of failure. Additionally, it allows for easier management and maintenance of the network.