Compression
A method for reducing the volume (in bits) or flow (in bit / s) of digitized data (voice, images, texts, ...).
Audio Compression
Is to keep the volume within the audible lowering the loudest sounds, while increasing the weakest, as the level of Compression defined. Basically, these differences limit the volume of a song.
Data concentrator
Equipment that allows a transmission medium to serve more d 'DTE it has means of transmission.
Privacy
Keeping something private and secret with respect to all but those authorized to see.
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