Which of the following is a type of Internet connection that uses telephone lines?

The correct answer is (A) DSL.

• DSL (Digital Subscriber Line) is a technology that provides high-speed internet transmission over traditional copper telephone lines. It operates at frequencies higher than voice calls, allowing simultaneous internet access and voice communication without disruption.
• As a foundational broadband technology, DSL significantly expanded internet penetration in residential and commercial areas before the widespread adoption of fiber optics and cable networks, serving as a critical infrastructure for digital connectivity.
• Option (B) Cable uses coaxial cables originally built for television transmission. Option (C) Fiber Optics utilizes light pulses through glass fibers for ultra-high-speed data transfer. Option (D) Satellite relies on signals beamed to orbiting satellites, primarily used in remote or inaccessible regions where terrestrial lines are unavailable.