Special Edition Using TCP/IP, Second Edition

Summary

Routing mechanisms form the underlying structure for transmitting data over internetworks. Routing mechanisms are implemented on a routing architecture that originated as a set of computers connected to the ARPAnet backbone. The exponential growth of the Internet necessitated the creation of another backbone called NSFNET. This changed the routing architecture from a core routing architecture to a peer backbone routing architecture. To determine the route to be taken by a datagram, routers extracted routing information from routing tables maintained in a router. Although routing datagrams that contained partial information was supported, the inherent inefficiencies of this method resulted in the core routing architecture adopting a method ...