Which statement about the BFD-BGP Multihop Client Support and cBit feature is true?

The BFD cBit provides contextual information for failures; it does not replace BGP graceful restart or fast-failover, but rather helps BGP clients leverage these features more effectively.

The cBit is a flag in BFD that signals if a BFD session failure is caused by an underlying control plane event, such as a router processor switchover, or if it is independent, indicating a data plane failure. This information allows client protocols to implement more intelligent recovery mechanisms.

While BFD generally improves convergence, the cBit specifically provides context about the failure's cause rather than directly improving raw convergence speed or response time to adjacency changes.

The BFD cBit feature is not designed to identify VPNv4/VPNv6 traffic or prevent prefix purging in multihomed VPN scenarios; its role is limited to indicating control plane independence for BFD session failures.