Final answer:
DSL commonly uses POTS (Plain Old Telephone Service) leveraging the existing copper wire infrastructure. Fiber optics is an alternative to DSL, whereas coaxial cable and satellite represent other separate modes of telecommunication.
Step-by-step explanation:
The technology that is typically used in conjunction with DSL (Digital Subscriber Line) for providing internet and telephone services is POTS (Plain Old Telephone Service). DSL technology leverages the existing telephone line infrastructure which uses copper wires to connect homes and businesses to the telephone network. Despite advances in technology such as fiber optics and cellular networks, DSL relies on the POTS network, essentially running alongside traditional voice services without interfering with them.
Fiber optics, while used extensively in telecommunications, particularly for long-distance and high-speed communication, is not the typical complementary technology for DSL. Rather, fiber optics represent an alternative to DSL where infrastructure allows. Moreover, coaxial cable is often associated with cable internet services, and satellite technology provides internet service in remote areas where cable and DSL are not practical options.