What advanced routing function allows for multiple redundant paths between networks?

The advanced routing function that allows for multiple redundant paths between networks is best described as load balancing. Load balancing enables routers to distribute incoming traffic across multiple paths, which helps optimize the use of available bandwidth, improve fault tolerance, and ensure that network resources are used efficiently. This redundancy is crucial for maintaining network availability and reliability, as it allows for the seamless rerouting of traffic if one path fails.

While other concepts may contribute to network routing, such as route summarization, which condenses multiple routes into a single route advertisement, or path vectoring, which primarily helps in managing routing information between different autonomous systems, they do not directly pertain to the establishment of multiple redundant paths for traffic management. Load splitting, although it sounds relevant, is not a standard term used in networking in the same way load balancing is understood. Therefore, the function of load balancing is specifically designed to facilitate redundancy and efficient traffic distribution across multiple paths in a network.