CISSP Practice Exam 2025 – Complete Prep Guide

Digital Subscriber Lines (DSL) are primarily designed to deliver digital internet access to homes and offices. This technology operates over traditional telephone lines, utilizing frequencies that are not used by voice calls, which allows simultaneous internet usage and phone calls. The capability to deliver high-speed broadband internet makes DSL a widely used option for residential and business internet connectivity.

While analog telephone services are provided over the same infrastructure, they are not a function of DSL technology itself. Instead, the DSL service allows for digital data transmission. Similarly, while cable and satellite services may provide television broadcast, this is not a function of DSL technology. Lastly, secure file transfer services rely on internet protocols and infrastructure, but they are not a service provided by DSL directly. Therefore, the distinction of DSL as a digital internet access service is paramount.