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

Question

UnlockIAS · Accepted Answer

Correct — A, DSL (Digital Subscriber Line). DSL delivers broadband internet over the same copper telephone wires used for landline calls, using frequencies above the voice band so internet and phone service can run over one line at the same time.

Why the other options are wrong — (b) Cable internet runs over the coaxial cable used for cable television, not over telephone lines.  (c) Fiber-optic internet uses dedicated optical-fibre cable, not the copper telephone network.  (d) Satellite internet is wireless — it communicates with an orbiting satellite via a dish and needs no telephone line at all.

Concept: Internet connections differ mainly by the physical medium carrying the signal: DSL uses existing copper telephone lines, cable uses coaxial TV cable, fibre uses dedicated optical cable, and satellite uses a wireless link to space. DSL's advantage was leveraging telephone infrastructure already installed in most homes, making it one of the earliest widespread broadband options.

State PCS 2023 Q42 — Science & Technology PYQ with Answer

State PCS 2023 Q42 — Science & Technology PYQ with Answer