DOCSIS 3.0 protocol is the internet standard that is a much-updated version of DOCSIS 1.0 or 2.0. DOCSIS 3.0 will provide high-speed internet connection than its predecessors. There is also DOCSIS 3.1 technology in modems and routers. If you prefer advanced technology for ultra-fast internet, you can opt for 3.1. DOCSIS 3.0 will support download internet speed up to 1 Gbps.