2. 计算机
  3. Refer to the exhibit． Hosts in network 192．168．2．0 are unable to reach hosts in network 192．168．3．0． Based on the output from Ro

Refer to the exhibit． Hosts in network 192．168．2．0 are unable to reach hosts in network 192．168．3．0． Based on the output from Ro

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问题 Refer to the exhibit． Hosts in network 192．168．2．0 are unable to reach hosts in network 192．168．3．0． Based on the output from RouterA, what are two possible reasons for the failure?
选项 A、The cable that is connected to S0/0 on RouterA is faulty．
B、Interface S0/0 on RouterB is administratively down．
C、Interface S0/0 on RouterA is configured with an incorrect subnet mask．
D、The IP address that is configured on S0/0 of RouterB is not in the correct subnet．
E、Interface S0/0 on RouterA is not receiving a clock signal from the CSU/DSU．
答案E
解析 F串行接口的状态为一个up一个down，出现的可能的情况有：没有收到keeplive的报文，或是接口的时钟频率没有设置，或是接口封装不匹配，这些都有可能导致接口的链路层为down的。
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