Which three of the following are distance vector algorithm (DVA) stability features?

The correct answer highlights three main stability features associated with distance vector algorithms.

Hop-count limits are employed in distance vector protocols to prevent routing loops and ensure that routes do not become excessively long, which could lead to inefficiency and incorrect routing. By setting a maximum hop count, the network can maintain a limit on how far a packet can travel, which is particularly important in preventing infinite loops in the network.

Split horizon is a technique used in distance vector algorithms that helps to prevent routing loops. It works by prohibiting a router from advertising a route back onto the interface from which it was learned. This prevents the router from sending misleading routing information regarding the routes that it has received, which again helps maintain the integrity and stability of the routing table.

Poison reverse is another feature that works alongside split horizon. When a router detects that a route has become invalid, it sends an update back to the source router indicating that the route is now unreachable, effectively "poisoning" that route in the routing table for the other router. This immediate action helps to quickly propagate the information about invalid routes, fostering a more stable routing environment.

The other options present terms and concepts that do not align fully with the stability features of distance vector algorithms. For instance,