What are they?
Broadband is a type of high speed internet connection that has surpassed dial-up as the standard way to connect to the internet and ADSL is the most common form it comes in.
How do they work?
ADSL broadband is provided through existing BT phone lines, and is the most widely available broadband connection on the market. ADSL broadband comes from your local telephone exchanged, owned by BT, through a fixed line access network made out of copper wires which are the telephone lines on the streets. The information you receive is a series of digital signals that come through these lines. These are then split into phone and internet by a micro filter, a small, plastic box that plugs into the main BT socket.