Which acronym represents a technology that provides high-speed internet over copper telephone lines?

• A. DLS
• B. DSS
• C. DSL
• D. DSC

Answer: (C)

Digital Subscriber Line is the technology that delivers high-speed internet over the existing copper telephone network. It works by using higher-frequency signals on the same copper pair while leaving voice channels available, so you can use the phone and internet simultaneously. A DSL modem at your place talks to a DSLAM at the service provider’s end to carry data over the copper line, with speed that depends on distance from the central office and line quality. Variants like ADSL (asymmetric) favor downstream speeds for typical internet use, while VDSL offers higher speeds over shorter distances. The other acronyms aren’t standard terms for broadband over copper, so they don’t describe this technology.