CISSP Practice Exam 2025 – Complete Prep Guide

Digital Subscriber Line (DSL) primarily utilizes copper pairs to provide services. This technology takes advantage of the existing copper telephone lines to transmit digital data, allowing simultaneous voice and data transmission over the same line. By utilizing the higher frequency channels on copper wiring, DSL can deliver internet access while still enabling traditional voice communication.

Copper pairs are well-established in telecommunications, making DSL an attractive option for internet service providers, as they can offer broadband without the need for extensive new infrastructure. The compatibility with existing phone lines facilitates a quicker and less costly deployment of services to customers.

In contrast, fiber optics rely on glass fibers to transmit data using light, which allows for much faster speeds and greater distances but requires a complete installation of new infrastructure. Coaxial cables, while used for cable internet services, operate on a different technology framework that is distinct from DSL. Wireless signals involve different technologies such as Wi-Fi or cellular, which do not utilize physical copper pairs.