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单选题
How do you ping from configuration mode?()
A

[edit interfaces]   user@router# run ping 1.1.1.1

B

[edit interfaces]   user@router# ping 1.1.1.1

C

[edit interfaces]   user@router# up ping 1.1.1.1

D

[edit interfaces]   user@router# exit ping 1.1.1.1


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