Introduction - If you have any usage issues, please Google them yourself
According to a right of the undirected graph to generate the specified node (router) routing table with nodes N, N' s routing table routing by a number of components, routing is < the purpose of nodes, next hop> dual group node is one of the purpose of node N as the source node by node N can arrive (the purpose of node N are neighbor nodes) or through a neighbor node N can be indirectly Get the nodes, that is one of the next hop of a node N from home, the adoption of the neighbor may be an indirect purpose of node arrival and arrival at the destination node for the smallest cost of the path path.