第21题: [多项选择]城市机动车公共停车场的类型有( )。 A. 城市主要出入口的大型机动停车场 B. 城市各类中心附近的市内机动车公共停车场 C. 超级市场、大型城外游憩地的机动车停车场 D. 城市各出人口的大型机动停车场 E. 城市各类中心附近的市外机动车公共停车场 参考答案:A,B,C
第22题: [简答题]OSPF的域间路由通告行为?问R1能够将AREA 1通告给AREA 0的域间路由在通告回AREA 1吗?为什么? 参考答案:
NO. This distance vector behavior prevent R1 advertise routes learn from area 1 back to area 1.
According to RFC 2328,there is a rule equivalent of a Distance Vector protocol’s split horizon logic.The rule is described as below: before ABR advertises a summary LSAs(including type 3 and type 4 LSA) to a attached area, if the next hop of the route in the routing table entry belong to the area itself, do not generate a summary-LSA for the route.