> UUID Version 2 (v2) is reserved for security IDs with no known details.
I found the details in about 2 minutes: Click the link in the article to take me to the section of RFC 9562 that says it's defined as part of DCE, click the first link in that paragraph to go to the spec, ctrl-f "UUID", then jump to appendix A (deceptively named "Universal Unique Identifier") which has all the details.
Is it really too much to ask to CLICK YOUR OWN LINKS?