单项选择题

Which one of the Cisco IOS commands can be used to verify that either the Cisco IOS image， theconfiguration files，or both have been properly backed up and secured？（）

A.show archive
B.show flash
C.show file systems
D.show secure bootset

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CCNA(640-553)

Which one of the Cisco IOS commands can be used to verify that either the Cisco IOS image， theconfiguration files，or both have been properly backed up and secured？（）