抓包监测工具，是当前较为流行的一种计算机网络调试和数据包嗅探软件。Ethereal 基本类似于tcpdump，但Ethereal 还具有设计完美的 GUI 和众多分类信息及过滤选项。用户通过 Ethereal，同时将网卡插入混合模式，可以查看到网络中发送的所有通信流量。 Ethereal 应用于故障修复、分析、软件和协议开发以及教育领域。它具有用户对协议分析器所期望的所有标准特征，并具有其它同类产品所不具备的有关特征。-Is a more popular computer network debugging and packet sniffing software. Ethereal basically similar to tcpdump, but Ethereal also has a perfect design of the GUI and a number of classification information and filtering options. Users through Ethereal, while the network card into the mixed mode, you can view all the traffic sent to the network traffic. Ethereal is used in fault repair, analysis, software and protocol development, and education. It has all of the standard features that users expect　a protocol analyzer and has features that are not available in other products of its kind.