VoIP is a breakthrough technology for network communications, it is based on Packet-Switched Network, its signal protocol and real-time data travels over the internet. Thus, it can be easily attacked.

• VoIP是指在IP数据网络上提供通话服务,由于VoIP承载于分组交换网络,其信令协议和实时数据在Internet上传播,它继承了网络易受攻击的缺点。