What is a significant feature of how DSL operates?

A significant feature of DSL (Digital Subscriber Line) is that it allows for full-duplex service on a single twisted pair. This means that DSL can simultaneously send and receive data over the same line without interference, enabling effective use of the existing telephone infrastructure which typically includes twisted pair cabling. This full-duplex capability enhances the overall performance and efficiency of the data transmission.

In contrast, some other forms of data transmission do not support simultaneous two-way communication over the same medium, or may require separate lines for sending and receiving data. The ability to utilize standard telephone lines for high-speed internet access while still allowing for voice calls to occur concurrently is one of the major advantages of DSL technology.

The other options present limitations or misunderstandings about the technology. For instance, DSL does not exclusively operate under fiber-optic cables or satellite connections, as it primarily utilizes copper telephone lines. Additionally, while DSL can provide asynchronous data transfer rates in some configurations, the defining feature of its operation is indeed the full-duplex capability on twisted pairs.