说明：  OSPF路由协议种典型链路状态（Link-state）路由协议般用于同路由域内里路由域指自治系统（Autonomous System）即AS指组通过统路由政策或路由协议互相交换路由信息网络AS所有OSPF路由器都维护相同描述AS结构数据库该数据库存放路由域相应链路状态信息OSPF路由器正通过数据库计算出其OSPF路由表
(OSPF link state routing protocol typical (Link-state) routing protocol generally used in the same routing domain routing domain refers to the autonomous system (Autonomous System) that refers to the group AS AS network to exchange routing information to each other through the system all the OSPF routing protocol routing policy or Description AS router maintains the same structure of the database stored in the database field corresponding link-state routing information database OSPF routers are calculated by its OSPF routing table)