Network Foundation-static routing + dynamic routing
Description: after marking each network node with IP, if you let the two nodes separated by multiple network nodes communicate, you need a "middleman" to pull strings, and you have to tell a node data step by step, and how to go to the opposite node step by step.
Static routing: manually configure static routing information so that packets with matching destination addresses can be forwarded using a dedicated line interface or next-hop IP address according to the routing information.
Advantages: simple configuration and less system resources
Disadvantages: large-scale network configuration is cumbersome and lack of flexibility, when the network topology changes, the routing information needs to be adjusted manually.
Dynamic routing: sharing and dynamically learning routing information using algorithms and protocols
Advantages: real-time, flexibility, accuracy
Disadvantages: high resource consumption and high maintenance cost
RIP and IGRP-- classful routing: routing information is published and transmitted without subnet mask
RIPv2,ospf,EIGRP,is-is,BGP---- classless routing: supports VLSM and CIDR: routing information is issued and transmitted with subnet mask marking.
OSPF,ISIS-using Dijkstra algorithm, link-state protocol
RIP,RIPv2,IGRP-uses the Bellman-ford algorithm. Distance vector protocol
EIGRP--CISCO dedicated diffusion update algorithm, which is a distance vector route like IGRP, but EIGRP supports classless routing and fast convergence
