2. 计算机
  3. Users on the 172．17．22．0 network cannot reach the server located on the 172．31．5．0 network．The network administrator connected t

Users on the 172．17．22．0 network cannot reach the server located on the 172．31．5．0 network．The network administrator connected t

admin2019-04-08  28
问题 Users on the 172．17．22．0 network cannot reach the server located on the 172．31．5．0 network．The network administrator connected to console port,issued the show ip route command,and was able to ping the server．Based on the output of the show ip route command topology shown in the graphic,what is the cause of the failure?
选项 A、        IP routing is not enabled
B、        A static route is configured incorrectly
C、        The network has not fully converged
D、        The FastEthernet interface on Coffee is disabled
E、        The routing table on Coffee has not updated
答案D
解析 题干说172．17．22．0 network不能连接172．31．5．0 network中的服务器，但是coffee路由器可以ping通。如果不看题目给出的路由表，很容易可以选择D答案。题目中路由表给出一条错误的默认路由，如果这条路由是错的，路由器coffee也不能ping通服务器，再者配置下一跳地址不存在的默认路由不会出现在路由表中，由此可见，此题中的错误默认路由是一个陷阱或是出题者的失误。
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