EC285 Lecture Notes - Lecture 1: Modular Connector, Connectionless Communication, Algebraic Number Field
Document Summary
The task of deciding an optimal route for an ip packet to take as it moves across the internet is potentially difficult. In an attempt to optimize routing decisions, a gateway (or router) will maintain a routing table of best paths to take for the ip packets it receives. A routing table on a gateway for a large network is unlikely to remain unchanged (static) for long, as hosts frequently come and go, and ip addresses are continuously reused. Large, independently-administered networks -such as one under the control of a major. Internet service provider (isp) will guide ip packets arriving from the outside to their destination machines by maintaining routing tables for all the hosts in their control. A large network of this type, of which there are more than 47 thousand, according to wiki, is called an autonomous (as). thus, external gateways don"t need internal routing info for an.
