The opening transmission channel makes that there is no clear border in wireless network, and the intruder can get the information of wireless network and intrude it without physical connection.

• 无线网络的开放性使其没有明确的边界,攻击者无需物理连接就能获取网络的相关信息并对其进行攻击,对无线网络的内部资源造成了极大的威胁。