300-515 · Question #99
Which two functions describe CsC architecture on the network? (Choose two.)
The correct answer is A. It allows multiple customers' carriers to connect to their remote sites through another backbone D. It does not support end-user routes. Carrier-of-carrier (CsC) lets smaller carriers peer with a larger backbone carrier so those carriers’ customers can reach remote sites across the backbone. In a CsC model the backbone carrier only carries the downstream carrier’s summarized routes (not individual end-user…
Question
Which two functions describe CsC architecture on the network? (Choose two.)
Options
- AIt allows multiple customers' carriers to connect to their remote sites through another backbone
- BIt supports MPLS VPN and internet services.
- CIt does not use optical link types that are supported with MPLS.
- DIt does not support end-user routes.
- EIt supports the use of IPsec VPNs to separate traffic from different carriers.
How the community answered
(41 responses)- A90% (37)
- B2% (1)
- C5% (2)
- E2% (1)
Explanation
Carrier-of-carrier (CsC) lets smaller carriers peer with a larger backbone carrier so those carriers’ customers can reach remote sites across the backbone. In a CsC model the backbone carrier only carries the downstream carrier’s summarized routes (not individual end-user prefixes), so it doesn’t install or learn end-customer routes in its core.
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