题目内容

You are unable to telnet to a router at address 203.125.12.1 from a workstation with the IP address 203.125.12.23. You suspect that there is a problem with your protocol stack. Which of the following actions is most likely to confirm your diagnosis?（）

A. ping 127.0.0.0
B. ping 203.125.12.1
C. telnet 127.0.0.1
D. ping 127.0.0.1
E. tracert 203.125.12.1

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