IP ROUTING
ROUTING
Routers use a routing table to accomplish the task of forwarding the packets properly throughout an internetwork.
There are three different ways a routing table is built:
- Statically
- Default
- Dynamically
A. Statically or Static Routing:
Static routing is not really a routing protocol. Static routing is simply the process of manually entering routes into a device’s routing table via a configuration file that is loaded when the routing device starts up. Static routing is the simplest form of routing, but it is a manual process.
B. Default:
A default route, also known as the gateway of last resort, is the network route used by a router when no other known route exists for a given IP packet’s destination address.
C. Dynamically or Dynamic Routing:
Routing that adjusts automatically to network topology or traffic change also called as adaptive routing. Dynamic routing protocols will then distribute this ‘best route’ information to other routers running the same routing protocol, thereby extending the information on what networks exist and can be reached. This gives dynamic routing protocols the ability to adapt to logical network topology changes.
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