Data compression reduces the file size of digital data. This is important for saving storage space, speeding up file transfers, and reducing bandwidth usage during transmission over networks.
Key points
Definition:Compression: the process of reducing the size of a file to save storage space or speed up transmission.
Compressed files take up less storage space on devices.
Compressed files are faster to transmit over a network (less data to send).
Compression reduces bandwidth usage, which is important for streaming and downloading.
Exam Tip:When asked WHY compression is needed, give at least TWO reasons: saves storage space AND speeds up transmission/reduces bandwidth.
Exam Tip:Be PRECISE. Don't just say 'it is faster' — state WHAT is faster (e.g. 'faster to upload/download/transmit'). Don't say 'takes up less space' — say 'takes up less STORAGE space'.