What is static routing?
Configured by the administrator manually routing information. A static route is fixed and will not change, even if network conditions have changed or re-configuration.
Static routing advantages : ① high low network security (without the need to exchange routing table) ② bandwidth ③ ④ easy to configure the network topology clear
Static routing disadvantages : ① long time-consuming configuration and maintenance (for large networks) ② can not dynamically reflect the network topology
When using static routing?
Simple Network (less equipment), small networks with dynamic routing protocols hybrid network (when a network can only be reached by a path), long-term fixed network
What is dynamic routing?
Refers to a router can build its routing table automatically depending on the particular routing information exchange between routers, and can be automatically adjusted according to changes in a timely manner to links and nodes. When the link between the node or network fails, or the presence of other available routes, dynamic routing can choose the best available route itself and continues to forward packets.
In simple terms: Routers use routing protocols to obtain routes from other routers there, when the network topology changes, the router will automatically update routing information.
Dynamic routing protocols advantages : ① can automatically adapt to changes in network status ② automatically maintain routing information
Dynamic routing protocols disadvantages : ① network bandwidth and system resources (exchange routing information) ② less secure
When using dynamic routing?
Large and complex network environments
Dynamic routing protocol classification
① interior gateway protocol: Distance vector protocols (RIPV1, RIPV2, EIGRP), link state protocol (OSPF, IS-IS)
② Exterior Gateway Protocol: BGP