How can I identify if my existing Mac backup is setup via SMB or APF to my NAS?

Dear Community,

in preparation for the time macOS will no longer support Time Machine via AFP, I want to identify if my current setup on my Mac mini M4 with macOS 26.1 (Tahoe) is already setup via SMB to my NAS or still via AFP?

FYI. I am computer nerd with multiple older macs, which require AFP enabled on my NAS, so disabling it is not an option.

Any helpful answers are highly appreciated!

Maury

ps: I am a 30+ year computer veteran with knowledge going back to OS6. Plus Windows, Linux and Unix in many different flavors. So I am not a stranger to the command line.