网络已成为报纸、广播和电视之后的第四代信息媒体。目前,网上浏览和下载信息已成为人们遨游知识海洋的重要途径。如今,一种让文件传输更快捷的技术正在普及,那就是流媒体技术。音频、视频等多媒体文件的容量通常非常庞大,一般都使用固定介质如计算机硬盘、光盘等存储。随着网 The Internet has become the fourth generation of information media after newspapers, radio and television. At present, browsing and downloading information on the Internet has become an important way for people to navigate the ocean of knowledge. Nowadays, a technology that makes file transfers faster is becoming popular. It is streaming media technology. The capacity of multimedia files such as audio and video is usually very large. Generally, fixed media such as computer hard disks and optical disks are used for storage. With the net