Which of the following are features of IGRP stability? (Choose three)

For IGRP (Interior Gateway Routing Protocol), its stability features are essential for maintaining a reliable and efficient routing environment. One significant aspect of IGRP's stability is the use of holddowns. Holddown timers help to prevent routing loops and ensure that when a route is deemed invalid, it remains in a hold state for a certain duration. This mechanism allows the network to stabilize before another potentially conflicting update can occur, thus enhancing the overall stability of the routing information.

In addition to holddowns, IGRP incorporates other methods for ensuring stability, such as load balancing and split horizons. Load balancing allows traffic to be distributed across multiple routes to the same destination, improving resource utilization and enhancing redundancy. Split horizons help to prevent routing loops by prohibiting a router from advertising a route back out the interface from which it was learned. Poison reverse, while useful in other protocols like RIP to invalidate routes, is not a feature of IGRP.

In summary, holddowns play a crucial role in IGRP's capability to maintain stability in the routing table by controlling the propagation of updates and ensuring that erroneous routes do not lead to transient instability in the network.