It is that IP data packets on the network is very likely being stolen by hackers, resulting in a serious consequence that part of voice is lost or tapped.

因此，IP语音在网络上的安全传输是一个非常重要的问题，已成为研究和应用的热点。

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The internet sends information as discrete packets of data using a suite ofprotocols known as TCP/IP.

该网络使用 TCP/IP 协议发送离散的数据包来传输信息。

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Network traffic is made up of IP packets or simply packets — small chunks of data traveling in streams from a source system to a destination system.

网络流量由IP信息包(或，简称信息包)—以流的形式从源系统传输到目的地系统的一些小块数据—组成。

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