Which mechanisms can be put in place to increase network survivability?
A.
Protection, where backup resources are pre-allocated and reserved; or restoration, where each trail can be recovered thanks to a 1+1 protection mechanism
B.
Protection, where backup resources are allocated upon failure; or restoration, where each trail can be recovered thanks to a 1+1 protection mechanism
C.
Protection, where backup resources are allocated upon failure; or restoration, where backup resources are pre-allocated and reserved
D.
Protection, where backup resources are pre-allocated and reserved; or restoration, where backup resources are allocated upon failure.
The Answer Is:
D
This question includes an explanation.
Explanation:
There are two main mechanisms that can be put in place to increase network survivability: protection and restoration. Protection involves pre-allocating and reserving backup resources so that they are ready in case of a failure. Restoration involves allocating backup resources upon failure and using a 1+1 protection mechanism to recover each trail. This ensures that the network is able to re-route traffic in the event of a failure, increasing the overall survivability of the network.
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