寻求帮助！计算机专业，中译英

Wireless local area network coverage range is several hundreds meters , wireless equipment can move freely , the person is suitable for in the application environment moving nature low within a such range. Wireless local area network carrier frequency pays and unnecessarily besides for public frequency channel, the cost using the wireless local area network as a result is very low. Wireless local area network bandwidth is able to develop the bandwidth foretelling to up to hundred more , the bandwidth being able to satisfy the most consumer demands. Owing to that all above cause , the wireless local area network win enthusiastic echo in the marketplace,and, prompt development becomes one kind of wireless important cut-over Internet technology. But have very big openings to the outside world since the wireless local area network applies, the very difficult to control , therefore wireless local area network of data propagation range will be confronted with more austere safety problem.