Cable Internet service is a type of broadband connection that transmits data over a cable television network.
Unlike dial-up and DSL, which transmit data over a phone line, cable Internet service uses the cable TV infrastructure to transmit data. Cable Internet users have a special cable modem, provided by the cable Internet companies themselves, that use a slice of the available bandwidth of the connection to download and upload information. Just like how a DSL connection does not tie up its phone line, a cable Internet connection does not affect the ability to watch TV throughout throughout the house.
DOCSIS stands for Data Over Cable Service Interface Specifications, and is the technology standard that cable modems use to provide internet access over a cable television system. A DOCSIS certified modem is will work with any DOCSIS compliant cable system. DOCSIS modems are generally easier to support because a lot of documentation is available.
Some advantages to consider: