Overview是Linux,FreeBSD,UNIX,Windows下的网络扫描和嗅探工 具包,其基本功能有三个,一是探测一组主机是否在线 其次是扫描 主机端口,嗅探所提供的网络服务 还可以推断主机所用的操作系统-Overview is a Linux, FreeBSD, UNIX, Windows Network scanning and sniffing tool kit, which has three basic functi