What is one of the benefits of using multiarea OSPF routing?

One of the primary benefits of using multiarea OSPF routing is that topology changes in one area do not cause SPF (Shortest Path First) recalculations in other areas. This design aspect enhances the scalability and stability of OSPF networks. When OSPF is segmented into multiple areas, each area operates independently regarding route information and topology changes.

For instance, if there's a link failure or a new link is added in one area, only that area will have to recompute its routes through an SPF calculation. This localized recalculation means that the other areas are unaffected, allowing them to continue routing without interruption or additional resource consumption. This is particularly important in large networks where a topology change in one section should not impact the entire network's performance or cause unnecessary recalculations elsewhere.

By minimizing the impact of changes to individual areas, the overall network efficiency is maintained, and the need for extensive resource usage is reduced.