What is the purpose of a Digital Subscriber Line (DSL)?

The purpose of a Digital Subscriber Line (DSL) is to send high-speed data over existing phone lines. DSL technology utilizes the unused bandwidth on telephone lines, allowing for simultaneous voice and data transmission without interference. This means that while a user is on a call, they can still access the internet using DSL, making it a versatile solution for broadband connectivity.

Options that mention fiber-optic connections or transmission from satellite systems focus on different types of internet technologies that do not use traditional phone lines. Similarly, connecting cable modems to televisions is specifically related to cable internet services, which operate through coaxial cables rather than phone lines. Hence, the primary function of DSL technology in delivering internet access through existing phone infrastructure makes it the clear choice for the correct answer.