which Cisco IOS debug commands can be issued?

Which prompt indicates the configuration mode at which Cisco IOS debug commands can be issued?

A.
router>

B.
router#

C.
router(config)#

D.
router(config-if)#

Explanation:
You would use privileged EXEC mode, as indicated by the router# prompt, to issue Cisco IOS show and debug
commands. All debug commands are entered in privileged EXEC mode. A brief description of all the debugging
commands can be displayed by entering the following command in privileged EXEC mode at the command line:
debug?
Debugging output consumes high CPU processing power and can leave the system unusable. The debug
commands should be reserved to troubleshoot specific problems, preferably with the help of Cisco technical
support staff.
The prompt router> indicates user exec mode, which provides limited access to the router.
The prompt router(config)# indicates global configuration mode, which allows configuration settings affecting
the entire router. Passing through this mode is also required to access configuration mode for specific
interfaces as well.
The prompt router(config-if)# indicates interface configuration mode, which allows configuration of the interface
specified when entering this mode.
Objective:
Infrastructure Management
Sub-Objective:
Configure and verify device management

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