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A device for transmitting usually digital data over telephone wires by modulating the data into an audio signal to send it and demodulating an audio signal into data to receive it.

http://en.wikipedia.org/wiki/Data_transmission

By changing or converting analog data to digital so that the computer can read it and also converts the digital data back to analog so that it can be sent to your internet provider.

(did u know that what u do on the net your net provider also sees it. it's true)

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10y ago

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