The system image show command output lists the value of "true or false" under the "Is Current" column. The image marked "true" indicates the image:

The 'Is Current' flag is set to 'true' for the firmware partition that was loaded at boot time and is the active running image. This flag reflects runtime state only - it does not convey version recency, download history, or next-boot selection, which are tracked by separate attributes.

The 'Is Current' column does not reflect version recency; determining the latest version requires comparing version strings, not this boolean flag.

The image designated for use after a reboot is tracked by a separate 'Is Default' or boot-priority flag, not by 'Is Current', which only reflects the currently active image.

Download status is not indicated by the 'Is Current' flag; a newly downloaded image would show 'false' under 'Is Current' until the system reboots into it.