Routing

•Routing is the process of managing the flow of data between network segments and between hosts or routers

•Data is sent along a path according to the IP networks and individual IP addresses of the hosts

•A router is a network device that maintains tables of information about other routers on the network or internet work

Static and Dynamic Routing

•A static route is a path that is manually configured and remains constant throughout the router’s operation

•A dynamic route is a path that is generated dynamically by using special routing protocols

•Dynamic routing method has two conceptual parts:

•Routing protocol used to convey information about the network environment

•Routing Algorithm that determines paths through the network

•Common Dynamic routing protocols:

•Distance vector routing protocols: Advertise the number of hops to a network destination (distance) and the direction a packet can reach a network destination (vector). Sends updates at regularly scheduled intervals, and can take time for route changes to be updated

•Link state routing protocols: Provide updates only when a network link changes state

•Distance Vector Routing

•Routing Information Protocol (RIP)

•Link State Routing

Open Shortest Path First (OSPF)