broadband, ADSL, 

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A very high speed Internet connection in which the bandwidth can be divided and shared by multiple simultaneous signals

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Asymmetric Digital Subscriber Line - this is used to enable faster data over a copper telephone line than a conventional voice band modem.

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Analogue and Digital signal

Analouge signal

Speech or music can be transmitted as a analouge or digital signal

Digital  signal

digital signals carry more information for second then analouge . This is the same whether optical fibres, cable or radio waves

digital signals maintain their quality over long distance better than analouge.

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