Which command returns a list of commands in which a given keyword is used throughout the Junos hierarchies?
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A. B. C. D.C
The correct answer is C. help apropos.
The "help apropos" command is used to search for a keyword in the Junos OS command hierarchy. This command returns a list of all the commands that contain the keyword you are searching for.
For example, if you want to find all the commands related to OSPF, you can use the following command:
shelluser@router> help apropos ospf This command will return a list of all the commands that include the keyword "ospf" in their syntax or description.
On the other hand, the "help topic" command provides information on a specific command or topic, "help reference" command provides the syntax of a specific command, and "help tip" command provides helpful tips on using Junos OS. These commands do not perform a keyword search throughout the Junos hierarchies like "help apropos".