Which command can be used to exit to EXEC mode from this current mode? switch(config-if) #
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A. B. C. D. E.E.
The correct answer is E. end.
Explanation: In Cisco IOS devices, switch(config-if) indicates that you are in Interface Configuration mode, which allows you to configure the settings of a specific interface. In order to exit from this mode and return to EXEC mode, where you can execute privileged commands, you can use several different commands, including Ctrl-C, Ctrl-L, quit, exit, and end.
However, the most appropriate command for exiting Interface Configuration mode is end. This command takes you directly to the privileged EXEC mode, which is indicated by the prompt switch#. The end command is often used to save any changes made in the configuration and return to the privileged EXEC mode in a single step.
Here's a brief overview of the other commands listed:
Ctrl-C: This command sends an interrupt signal to the device, which can be useful if a command is taking too long to execute or if you want to cancel a command. However, it does not exit you from Interface Configuration mode.
Ctrl-L: This command clears the screen and redraws the command prompt, but it also does not exit you from Interface Configuration mode.
quit and exit: These commands both exit the current mode, but they take you back to the previous mode rather than directly to the privileged EXEC mode. In the case of Interface Configuration mode, this would be global configuration mode (switch(config)#).
In summary, if you want to exit Interface Configuration mode and return to privileged EXEC mode, use the end command.