NET 4000 Chapter Notes - Chapter 11.4.3: Classless Inter-Domain Routing, Default Route, Default Gateway
Document Summary
A router is a device that sends packets from one network to another network. Routers receive packets, read their headers to find addressing information, and send them on to their correct destination on the network or internet. Routers can forward packets through an internetwork by maintaining routing information in a database called a routing table. Every linux system maintains a routing table in ram that it uses to determine where to send data on a network. The routing table typically contains the following information: The interface or next hop router used to reach the destination network. A cost value (also called a metric) that identifies the desirability of the route to the destination network (using distance, delay, or cost) A timeout value that identifies when the route expires. The default router (also known as gateway router and default gateway router) is the router that hosts forward packets to when:
