Refer to the exhibit. After a network audit a network engineer must optimize the current network convergence time. The proposed solution must consider link layer and control plane failures. Which…

Debounce timers delay link-state change notifications to suppress flapping, which increases convergence time rather than reducing it.

Fast hello timers only improve control plane failure detection through the routing protocol and do not address link layer failures independently of the routing process.

BFD establishes lightweight bidirectional hello sessions between adjacent nodes and can detect forwarding path failures in milliseconds, independent of the routing protocol's own hello and dead timers. It operates at the forwarding plane level, enabling it to detect both physical link failures and control plane (routing protocol) failures and immediately notify the routing layer to trigger reconvergence. BFD integrates natively with OSPF, IS-IS, BGP, and EIGRP, making it a single solution that satisfies both the link layer and control plane failure detection requirements.

LSP fast flood accelerates IS-IS topology update propagation after a failure is already known but does not improve the initial failure detection at the link or control plane layer.