What type of connection does a cable modem primarily use?

A cable modem primarily uses a cable TV line to connect to the internet. This type of connection leverages the same coaxial cables that deliver cable television service. The cable modem modulates and demodulates signals to transmit digital data over these lines, allowing for high-speed internet access.

Utilizing a cable TV infrastructure is advantageous because it typically provides greater bandwidth and faster connection speeds compared to other options like telephone lines or satellite connections, which often have limitations in terms of speed and reliability. Fiber optic lines, while fast, are not associated with traditional cable modem service but rather with fiber-optic internet service, which employs different technology. The reliance on a cable TV network is fundamental to how a cable modem operates and delivers internet services to users.