In this paper, the prevailing technices and tools of port scanners and network vulnerability scanners are analyzed and compared, and all kinds of these tools are tested.

• 摘要主要分析、比较和介绍了当前流行的端口扫描和网络弱点扫描技术及工具，并针对不同类型的扫描工具进行了测试比较工作。