Router R1 is a BGP speaker with one peering neighbor over link "A". When the R1 link/interface "A" fails, routing announcements are terminated, which results in the tearing down of the state for all BGP routes at each end of the link. What is this a good example of?
- fault isolation
- resiliency
- redundancy
- fate sharing
Answer(s): A
Explanation:
Fault isolation is the ability to isolate a failure to a specific component or area of the network, so that the rest of the network can continue to function. In this case, the failure of link "A" has isolated the failure to Router R1, and the rest of the network is not affected.
The other options are not as accurate descriptions of this scenario.
-Resiliency: Resiliency is the ability of a network to withstand failures and continue to function. This is achieved through a combination of fault isolation, redundancy, and other techniques.
-Redundancy: Redundancy is the duplication of components or resources in a network, so that if one component fails, the other component can take over. This is a way to achieve resiliency.
-Fate sharing: Fate sharing is the concept that the failure of one component or resource will cause the failure of other components or resources. This is not the case in this scenario, as the failure of link "A" has not caused the failure of any other components or resources in the network.