Which key could you use to auto-complete a command in the Junos CLI?

In the Junos CLI, the key utilized for auto-completing a command is the Tab key. When you begin typing a command and press the Tab key, the CLI attempts to complete the command based on the options available at that point in the context of the command line. This feature enhances efficiency and reduces the likelihood of typing errors by allowing users to quickly access command options and complete commands without typing them out in full.

The Enter key is used to execute a command after it has been completely typed, while the Spacebar is typically used to create spaces between commands or parameters when typing. The Ctrl key is often associated with various command-line shortcuts and functions but does not specifically serve the purpose of auto-completing commands in the Junos CLI.