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计算机
Refer to the exhibit. Router1 was just successfully rebooted. Identify the current OSPF router ID for Router1.
Refer to the exhibit. Router1 was just successfully rebooted. Identify the current OSPF router ID for Router1.
admin
2019-04-08
44
问题
Refer to the exhibit. Router1 was just successfully rebooted. Identify the current OSPF router ID for Router1.
选项
A、190.172.32.10
B、208.149.23.162
C、208.149.23.194
D、220.173.149.10
答案
C
解析
这是个关于OSPF的RID的选举的问题。在OSPF中,RID的选举过程是这样的:如果通过命令router-id 来指定一个RID,那么就采用手工指定的这个RID;如果没有手工指定,则在可以使用的接口中来选举,他是优先采用回环口的,如果只有一个回环口,就采用这个回环口的IP作为RID,如果有多个回环口,就采用这多个回环口中IP地址最大的作为RID;如果没有回环口,就采用物理接口中IP地址最大的接口IP作为RID。在上面的图中可以看到有两个回环口,而Loopback1的IP更大,所以208.149.23.194就做为RID了。
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