With the prevalency of multimedia message service in wired network, matured imformation service in wireless network is still restricted within text message.

目前其服务内容正从简单的纯文本信息拓展到由图片、声音和文字组合而成的多媒体信息，其覆盖范围正从有线网络延伸至无线网络。

The main aspect that makes wireless security different than security of wired networks is the uncontrollability of physical access due to transmission of data with radio waves.

由于数据的传输，使无线的安全不同胜于以线加强网络的安全的主要的方面以电波是身体通路的无法控制性。