The Interactive Glossary: Defining the Net
DSL
DSL, short for "Digital Subscriber Line", employs an unused portion of your telephone line, so there's no need to install another one in your home or office. The service is typically provided by your local phone company. To connect, you need a digital modem, usually provided by the phone company.
Since DSL service is delivered over a dedicated line, bandwidth is not shared with other subscribers as with cable. But connection speeds, ranging from 128 Kbps to 8 Mbps, depend on your distance from the local exchange. The maximum distance is about three miles (5 kilometers). If you live further than that, you can't hook up to DSL. Those living closest to the local exchange enjoy the fastest speeds.
