When you enter ? at the command-line prompt in Junos OS, the system provides assistance in two
significant ways. Firstly, it lists the available commands and options that can be used at the current
point in the command hierarchy, aiding users in understanding what commands they can execute
next. Secondly, it displays summary information about those commands and options, providing brief
descriptions or additional context that can help users understand the function of each command or
option. This feature is particularly useful for learning the command structure or for quick reference
when specific command syntax is forgotten.
