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Hierarchical routing Wikipedia. Most Transmission Control Protocol/Internet Protocol (TCP/IP) routing is based on a two-level hierarchical routing in which an IP address is divided into a network portion and a host portion. Gateways use only the network portion until an IP datagram reaches a gateway that can deliver it directly.. See more

Hierarchical routing Wikipedia
Hierarchical routing Wikipedia from image3.slideserve.com

Web  Hierarchical routing does introduce one new wrinkle: the routes chosen may no longer be globally optimal, at least if we also apply the routing-update.