单选题In the Cisco IOS, what is the definition of a global command?（）AA command that can be entered in any configuration mode.BA command that supports all protocols.CA command that is implemented in all IOS versions.DA command that is set once and affects the entire router.EA command that is available in every release of IOS.
单选题
In the Cisco IOS, what is the definition of a global command?（）
A
A command that can be entered in any configuration mode.
B
A command that supports all protocols.
C
A command that is implemented in all IOS versions.
D
A command that is set once and affects the entire router.
E
A command that is available in every release of IOS.
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