但是，由于无线局域网使用开放性的无线传输介质，也使他面临诸多安全威胁。
However , due to the use of an open wireless LAN wireless transmission media will allow him to face many security threats .
在无线传输介质里，提高无线信道的利用率能有效的提高系统的性能。
Improving the utilization of wireless channel can effectively improve the performance of the system .
无线传输介质