单选题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?（）Aping 127.0.0.0Bping 203.125.12.1Ctelnet 127.0.0.1Dping 127.0.0.1Etracert 203.125.12.1
单选题
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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