What does DSL stand for in telecommunications?

DSL stands for Digital Subscriber Line, which is a technology used to transmit digital data over the existing telephone lines. This technology allows for high-speed internet access while still enabling voice communication on the same line. The term "subscriber" indicates that this line is dedicated to an individual customer for their use, and "digital" refers to the fact that it is transmitting digital signals rather than analog.

By using DSL, multiple services can operate simultaneously without significant interference, which enhances the overall performance and efficiency of internet and telecommunications systems. This capability is particularly advantageous in residential and small business settings, where users may need reliable internet access alongside standard voice services. The other terms presented in the options do not accurately represent the established terminology within the field of telecommunications, which reinforces why Digital Subscriber Line is the correct and widely recognized designation.