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ADSL: Short for asymmetric digital subscriber line, a new technology that allows more data to be sent over existing copper telephone lines. ADSL supports data rates from 1.5 to 9 Mbps when receiving data (known as the downstream rate) and from 16 to 640 Kbps when sending data (known as the upstream rate). ASDL requires a special modem.
bandwidth: The amount of data that can be transmitted in a fixed amount of time. For digital services, the bandwidth is usually expressed in bits or bytes per second (bps). For analog devices, bandwidth is expressed in
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