CCNA Routing & switching:Explain about Static Routing
Static routing occurs when you manually add routes in each router's routing table. There are advantages and disadvantages to static routing, but that's true for all routing processes.
Static routing has the following advantages:
There is no overhead on the router CPU.
There is no bandwidth usage between routers.
It adds security because the administrator can choose to allow routing access to certain networks only.
Static routing has the following disadvantages:
The administrator must really understand the internetwork and how each router is connected in order to configure routes correctly.
If a network is added to the internetwork, the administrator has to add a route to it on all routers—manually.
It's not possible in large networks because maintaining it would be a full-time job in itself.
Command syntax for static route:
ip route [destination_network] [mask] [next-hop_address or exit_interface]
[administrative_distance] [permanent]