What does ADSL stand for?

ADSL stands for Asymmetric Digital Subscriber Line. This technology is primarily used for transmitting digital data over the existing copper telephone lines. The term "asymmetric" refers to the way in which the upload and download speeds differ; typically, the download speed is faster than the upload speed. This characteristic makes ADSL particularly suitable for home internet users who tend to download more data than they upload.

The other options do not accurately reflect the commonly accepted definition of ADSL. They either describe technologies or concepts that do not exist or misrepresent the functionality or purposes associated with ADSL. Understanding ADSL is crucial for recognizing its application in broadband internet technology and its role in enhancing digital communications.