Traffic on the Internet is extremely unpredictable, which can make for varied experiences when you must rely on the Internet for delivery of media. To create a consistent experience when receiving streaming media, Windows Media provides intelligent streaming.
Intelligent streaming is a way of creating a stream so that when a file is streaming, Windows Media Player detects network conditions and adjusts the properties of the stream to maximize quality. The highest-quality stream is delivered to you, regardless of network conditions. Intelligent streaming depends on the media being encoded at multiple bit rates. Windows Media Player has a variety of video streams to switch to when available network bandwidth fluctuates.