1.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?
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
F. a static route to network 192.168.10.0/24 with a local serial interface configured as the next hop
Answer: A
解释一下: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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本帖最后由 冷血 于 2007-11-29 11:11 编辑 ]