周期性广播路由表

距离矢量路由协议-CCNA中文版PPT下载

周期性广播路由表 距离矢量路由协议 * Purpose: This figure introduces the distance vector routing algorithm, the first of the classes of routing protocols, and outlines how it operates. Emphasize: Distance vector algorithms do not allow a router to know the exact topology of an internetwork. This information is somewhat analogous to the information found on signs at a highway intersection. A sign points toward a road leading away from the intersection and indicates the distance to the destination. Further down the highway, another sign also points toward the destination, but now the distance to the destination is shorter. As long as each successive point on the path shows that the distance to the destination is successively shorter, the traffic is following the best path.