2. 计算机
  3. A router receives information about network 192．168．10．0/24 from multiple sources． What will the router consider the most reliab

A router receives information about network 192．168．10．0/24 from multiple sources． What will the router consider the most reliab

admin2019-04-08  7
问题 A router receives information about network 192．168．10．0/24 from multiple sources． What will the router consider the most reliable information about the path to that network?
选项 A、a directly connected interface with an address of 192．168．10．254/24
B、a static route to network 192．168．10．0/24
C、a RIP update for network 192．168．10．0/24
D、an OSPF update for network 192．168．0．0/16
E、a default route with a next hop address of 192．168．10．1
答案A
解析 当到达同一个目的地有多种路径选择的时候，先在各自路径通过比较metric来选出各种路径的最优的，然后通过比较AD值 来选出各种路径中的最优的来。例如，到网段192．168．10．0/24,我收到了EIGRP的传过来的，也收到OSPF传过来的，这时我们先通过metric值，选出successor来，然后再通过比较EIGRP和OSPF的AD来选出最优的路径。在AD值中直连的AD值为0，metric 0。当然是这个路由是最可靠最优的了。
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