You are designing a network to support data, voice and video. Which two main factors will you address to improve network convergence? (Choose two.)

Event propagation delay (the time for LSAs or topology updates to flood across the network) is a real but secondary factor, typically much smaller than detection and recalculation delays, and is not considered one of the two main factors to optimize.

Failure detection delay is one of the two dominant convergence factors; the longer it takes for a router to recognize a link or neighbor failure (via hello timers, BFD, or carrier signals), the longer the entire convergence process is delayed before it can even begin. Tuning detection with BFD or aggressive timers is the most impactful convergence optimization.

Forwarding engine update delay (FIB/CEF programming time after the RIB is updated) is generally very fast and has minimal impact on overall convergence time compared to detection and recalculation.

Routing table recalculation delay - the time for SPF (OSPF) or DUAL diffusing computation (EIGRP) to complete and update the RIB after a topology change is detected - is the other primary convergence bottleneck and directly determines how quickly valid paths are reinstalled.