Hi Digerati,
Actually, directly from a Cox technician who came out to my apartment to troubleshoot my Internet connection due to dropouts. However, I must have mis-remembered the version numbers; sorry about that!
I just looked it up on Wikipedia, and the latest DOCSIS is version 3.1. That's weird, because I clearly remember a newer version being used and the Cox Tech making me change to a newer Cable Modem with the latest DOCSIS version on it. Boy, that's strange. Anyway, here's the Wikipedia link:
DOCSIS - Wikipedia
It's interesting that according to Wikipedia, the DOCSIS 2.0 to 3.0 changeover was in 2006; 11 years ago. The DOCSIS 3.1 has 2 revisions, one in 2013, and another one in 2016. I just checked my Cable...