IP routing
This involves not only protocols and technologies but includes the policies of the worldwide organization and configuration of Internet infrastructure.The process uses static configuration rules or dynamically obtained from routing protocols to select specific packet forwarding methods to direct traffic to the next available intermediate network node one hop closer to the desired final destination, a total path potentially spanning multiple computer networks.Routing protocols may be broadly distinguished by their realm of operation in terms of network scope.In order to achieve a successful transfer of data, the algorithm uses a routing table to select a next-hop router as the next destination for a datagram.The following presents a typical routing table in a Unix-like operating system: The host has several network interfaces.