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?
  • 1、
【正确答案】 1、E    
【答案解析】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。