Distinguish between progressive download and real-time streaming.
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Answer:Progressive download is the situation where a media file is downloaded on demand and stored on the local disk.The user is able to play the media file as it is being downloaded without having to wait for the entire file to be accessed.Realtime streaming differs from progressive downloads in that the media file is simply streamed to the client and not stored on the client disk.A limited amount of buffering might be used to tolerate variances in streaming bandwidth,
but otherwise the media file is played and discarded without requiring storage.