What is a global command?

A.
a command that is set once and affects the entire router

B.
a command that is implemented in all foreign and domestic IOS versions

C.
a command that is universal in application and supports all protocols

D.
a command that is available in every release of IOS, regardless of the version or deployment
status

E.
a command that can be entered in any configuration mode

Explanation:
When you enter global configuration mode and enter a command, it is applied to the running
configuration file that is currently running in ram. The configuration of a global command affects
the entire router. An example of a global command is one used for the hostname of the router.