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350-501 · Question #426

A network architect must implement CSC VPN services for a new backbone earner. Which two benefits does the architecture provide? (Choose two.)

The correct answer is B. It supports a scalable growth strategy that services multiple customers efficiently. E. It maintains a single backbone, which simplifies the VPN implementation to customers. Carrier Supporting Carrier (CSC) VPN architecture provides benefits by enabling scalable growth to efficiently service multiple customer carriers and by allowing customer carriers to simplify their VPN implementation by leveraging a single, shared backbone infrastructure.

Services

Question

A network architect must implement CSC VPN services for a new backbone earner. Which two benefits does the architecture provide? (Choose two.)

Options

  • AIt leverages IPsec to establish connections within the backbone, which eliminates the need for
  • BIt supports a scalable growth strategy that services multiple customers efficiently.
  • CIt relies on IP communications, which simplifies the network design.
  • DIt eliminates the need to maintain a centralized network-maintenance and operations strategy.
  • EIt maintains a single backbone, which simplifies the VPN implementation to customers.

How the community answered

(61 responses)
  • A
    20% (12)
  • B
    70% (43)
  • C
    7% (4)
  • D
    3% (2)

Why each option

Carrier Supporting Carrier (CSC) VPN architecture provides benefits by enabling scalable growth to efficiently service multiple customer carriers and by allowing customer carriers to simplify their VPN implementation by leveraging a single, shared backbone infrastructure.

AIt leverages IPsec to establish connections within the backbone, which eliminates the need for

CSC VPNs primarily leverage MPLS L3VPN (BGP VPNv4) technology within the backbone for service isolation and routing, not IPsec for establishing core backbone connections.

BIt supports a scalable growth strategy that services multiple customers efficiently.Correct

CSC VPNs enable a scalable growth strategy by allowing a backbone carrier to offer MPLS L3VPN services to multiple customer carriers, which in turn can extend VPN services to their own end-customers, making efficient use of resources.

CIt relies on IP communications, which simplifies the network design.

CSC VPNs, while carrying IP traffic, involve complex MPLS and BGP configurations, which do not necessarily simplify the overall network design; rather, they enable advanced service offerings.

DIt eliminates the need to maintain a centralized network-maintenance and operations strategy.

Both the backbone carrier and the customer carriers still require their own maintenance and operations strategies for their respective network domains; CSC VPN defines a service relationship, not an elimination of operational needs.

EIt maintains a single backbone, which simplifies the VPN implementation to customers.Correct

The CSC architecture maintains a single MPLS backbone (of the backbone carrier) that can be utilized by customer carriers, which simplifies the customer carrier's VPN implementation and expansion by eliminating the need for them to build out their own extensive core infrastructure.

Concept tested: Carrier Supporting Carrier (CSC) VPN benefits

Source: https://www.cisco.com/c/en/us/td/docs/ios/mpls/configuration/guide/mp_l3_vpn_cg/mp_l3_vpn_carr_supp_carr_ps.html

Topics

#CSC VPN#Service Provider VPN#MPLS VPN#Network Architecture Benefits

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