With the development of electronic technology and the Internet, multimedia has become the main form of class. Under normal circumstances, a computer and a screen can meet the needs of teaching. However, in the case of a large number of students, that might not meet the needs. Therefore, the screen sharing between computer and mobile phone via wireless network is of great importance in multimedia teaching. Nevertheless, the existing routing equipment does not support the broadcast of large streaming video files, so we expect to use a method to reduce the transmission of traffic and make the screen sharing between computer and mobile phone possible.
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