Which technology provides high-speed internet by using existing copper telephone lines?

Which technology provides high-speed internet by using existing copper telephone lines?

• A. Fiber optic
• B. Wireless
• C. Digital subscriber line (DSL)
• D. Cable

Answer: (C)

Digital subscriber line (DSL) uses the existing copper telephone lines to deliver high-speed internet. It carries data over higher-frequency signals on the same copper pair used for voice, with filters or splitters so you can use the phone and internet at the same time. At your location, a DSL modem talks to a DSLAM at the service provider’s central office, which multiplexes many connections onto the network. The speed you get depends on how far you are from the central office and the line quality; closer distances yield faster speeds. Fiber optic would require new fiber runs and is not the same copper-based approach. Wireless relies on radio signals, not wires. Cable uses coaxial cable, not the copper telephone lines. DSL is the technology that stays on the existing copper telephone lines to provide internet access.

Digital subscriber line (DSL) uses the existing copper telephone lines to deliver high-speed internet. It carries data over higher-frequency signals on the same copper pair used for voice, with filters or splitters so you can use the phone and internet at the same time. At your location, a DSL modem talks to a DSLAM at the service provider’s central office, which multiplexes many connections onto the network. The speed you get depends on how far you are from the central office and the line quality; closer distances yield faster speeds.

Fiber optic would require new fiber runs and is not the same copper-based approach. Wireless relies on radio signals, not wires. Cable uses coaxial cable, not the copper telephone lines. DSL is the technology that stays on the existing copper telephone lines to provide internet access.