Which keys are used in Junos CLI to autocomplete a command?

In the Junos CLI, the Tab key is specifically designed for command autocompletion. When a user starts typing a command and presses the Tab key, the system attempts to complete the command or suggest possible completions based on what has been entered thus far. This function greatly enhances efficiency by reducing the amount of typing required and helping users navigate commands and options more easily. The Space bar does not perform any function related to autocompleting commands, which reinforces that the Tab key is the primary tool utilized in this scenario for autocompleting commands within the Junos CLI environment.