Which is a design concept used to stop routing loops with distance-vector dynamic routing protocols?

The use of holddown timers allows the convergence of the network routing tables. This is used to hold down changes to the routing table before convergence can happen and a routing decision is hastily made by RIP. Although the topology database helps stop routing loops, it is not a functional component of distance-vector protocols. There is no such thing as anti-flapping ACLs. Counting-to-infinity is another name for a routing loop, and therefore, it is not a design concept used to stop routing loops.