Some of them allow you to choose, I don't think many distros have the openbsd-netcat installed as default choice though. I run Manjaro on my laptop and we have

Some of them allow you to choose, I don't think many distros have the openbsd-netcat installed as default choice though. I run Manjaro on my laptop and we have gnu-netcat as default with the choice of installing openbsd-netcat instead. On my Debian servers I have just "nc" which, if I'm not wrong, is the standard netcat (non-gnu/non-bsd).