Forwarding of packets (Data) from one network to another network choosing the best path from the routing table is called routing.so you will learn how it is used in a computer network from this article.
Types of Routing :
- Static Routing:- Static routing is the best route to choose from the administrator manually.
- Default Routing:– when no other routes available for destination IP address
- Dynamic Routing:- Dynamic routing is the best route to choose by router automatically.
Static Routing :
- Static routing is configured by the administrator manually.
- Destination network ID is mandatory to configure the static routing.
- Static routing is secure and fast.
- Use with small organizations with network ten to fifteen routers.
- The administrative distance for a static route is 0 & 1.
- Lower AD(Administrative Distance) define the trustworthiness of routing information, because of lower administrative distance the routing performance is higher.
Advantage of static routing :
- Because the route is entered by the administrator, the CPU load is less.
- Adds to security because the routes are added by the administrator manually.
A disadvantage of static routing :
- Everything needs to be configured manually therefore preferred for a small network.
- Any network change affects the whole network due to this administrator’s work will increase.
- In static routing, if any network needs to be removed or any new network comes in then the administrator needs to add manually.
Configure Static Routing :
Router(config)# ip route < destination network ID> <Destination subnet mask> <Next-hope IP address>
- In static routing,router only know about the directly connected route by default.
- Once PC find that destination is from a different network, then it will pass to the gateway of the network, that is why we need a gateway to communicate with a different network.
- Once the packet reaches the gateway router, it will check the routing table entry for the destination address.
- If the destination route was found in the routing table, then the packet will forward according to a route.
- And if the router does not found a destination route, the router will simply drop the packet.
Default Routing :
- A default routing protocol is configured for unknown destinations.
- Generally, use on the internet where the destinations are unknown.
- It is the last preferred routing protocol.
- Default route help in reducing the size of your routing table.
- If you have a common gateway of any destination you can use default routing.
- RouterX(config)# ip route 0.0.0.0 0.0.0.0 172.16.2.2
so I hope you will be able to know about what is routing in a computer network. so please let me know in the comments section.