Dec 07, 2021 · The most recent version of DOCSIS is DOCSIS 3.1, and if your internet provider uses DOCSIS 3.1 on your network, you’ll need a DOCSIS 3.1 modem. If you’re in a rural area, your internet connection probably still uses DOCSIS 3.0, but you can reach out to your internet provider’s customer service if you aren’t sure.