Which CLI command enables global configuration mode on an Aruba CX switch?

The config terminal command, which can be abbreviated to config t, is used to transition from the privileged EXEC mode (indicated by the # prompt) to the global configuration mode on an Aruba CX switch. This mode is the primary entry point for making configuration changes that affect the entire system, such as creating VLANs, configuring routing protocols, or setting system-wide parameters. All other configuration sub-modes are accessed from the global configuration mode.

B. enable: This command elevates the user session from User EXEC mode (>) to Privileged EXEC mode (#), which is a prerequisite for entering configuration mode.
C. show running-config: This is a display command used to view the current active configuration on the switch; it does not alter the CLI mode.
D. commit apply: This is not a valid command. The commit command is used to save the candidate configuration to the running configuration, effectively applying the changes.

1. ArubaOS-CX 10.12 Fundamentals Guide, Page 19, "CLI modes" section: "To enter global configuration mode, enter the configure terminal command from the privileged EXEC mode prompt."

2. ArubaOS-CX 10.11 CLI Reference Guide, Page 10, "CLI modes": "From privileged EXEC mode, you can enter global configuration mode. Most CLI commands are entered in global configuration mode. To enter global configuration mode, enter the configure terminal command."

3. ArubaOS-CX Switching Fundamentals, Rev. 20.11, Student Guide, Page 1-18, "CLI Modes": "From privileged EXEC mode, you can enter global configuration mode by entering the configure terminal or config t command. From this mode, you can configure global parameters and enter specific configuration modes."