What is a Cable modem's primary technology standard used for broadband?

The primary technology standard used for broadband in cable modems is DOCSIS, which stands for Data Over Cable Service Interface Specification. DOCSIS is specifically designed to provide high-speed internet access via a cable television network. This standard allows for the transmission of data alongside traditional cable TV signals, effectively utilizing the existing coaxial cable infrastructure.

DOCSIS enables cable operators to offer various tiers of internet service, providing capabilities for both downstream and upstream data transmission at high speeds. Standards have evolved over time, with DOCSIS 3.0 and DOCSIS 3.1 supporting much higher data rates, improving efficiency and accommodating more users on the same network.

While ADSL is a technology used for broadband over telephone lines, Ethernet is a standard for local area networks, primarily concerned with data communication within a limited area, and ISDN is an older technology for transmitting voice and data over traditional phone lines. DOCSIS stands out as the industry standard specifically tailored for the infrastructure utilized by cable modems.