In which Scenario is the BGP Accumulated IGP feature required ?
A. When BGP Link-State feature is enabled and it is required for BGP link state data to be downloaded to another component to the router.
B. When a more granular approach is required to effectively construct instruction to match a particular flow with source and destination in order to mitigate DDoS which remote triggered blackhole technique is not able to provide.
C. When multipaths are available and the cost community is required to influency the BGP best path selection process at the point of insersation .
D. when the bandwidth is available on each of the core links is mapped to the OSPF cost and BGP is required to carry this information of the PE devices simulating the OSPF behavior of computing the distance associated with the path.
