DSL is probably the most subscribed-to internet connection in the United States. And that is not difficult to understand, because DSL is available in both large and small cities as well as rural areas, thanks to fiber optics. DSL employs existing telephone lines, but uses a different signal for the Internet. DSL uses a higher frequency that does not interfere with the part of your telephone line that transmits voice calls. One of the main benefits of DSL is that it is available around the clock. It also provides much faster speeds for the transfer of data, which means you can get a high-speed connection with DSL. This means it’s much easier to download web pages and transfer documents online. Because DSL is so widely available, it is also one of the cheapest ways to connect to the internet; another reason it is so popular.