Certified Information Systems Security Professional (CISSP) Practice Exam 2025 - Free CISSP Practice Questions and Study Guide

The device that provides Internet access using broadband television cables is a cable modem. A cable modem connects to the existing infrastructure of cable television networks, allowing for high-speed Internet access. It takes advantage of the wide bandwidth available in coaxial cables that are already in place for cable television, enabling users to enjoy fast download and upload speeds.

Cable modems convert the data signals from the Internet into a format that can be understood by computers and other devices. They also perform the reverse process, sending data from a user's device back out to the Internet. This dual functionality, along with their ability to leverage the existing cable television infrastructure, makes cable modems a popular choice for broadband Internet access in many homes.

The other devices listed serve different purposes or use other types of connections. A DSL modem operates over telephone lines and is specific to Digital Subscriber Line technology. A fiber optic modem connects to fiber optic cables, which have a different setup and typically offer higher speeds. A satellite modem connects to satellite Internet, which relies on satellite communications rather than physical cabling. Each of these alternatives uses different mediums for Internet connectivity, which is why the cable modem is the correct choice for Internet access via broadband television cables.