NMap win32 Network Mappe
其基本功能有三个，一是嗅探一组主机是否在线；其次是扫描主机端口，嗅探所提供的网络服务；还能够揣度主机所用的操作系统。Nmap可用于扫描仅有两个节/点的LAN，直至500个节/点以上的网络。Nmap还答使用户定制扫描技巧。通常，一个简单的使用ICMP协议的ping操作能够满意通常需要；也能够深入嗅探UDP或许TCP端口，直至主机所使用的操作系统；还能够将一切嗅探成果记录到各种格式的日志中，供进一步分析操作。(It has three basic functions, one is to sniff whether a group of hosts is online; the other is to scan host ports and sniff the network services provided; it can also infer the operating system used by the host. Nmap can be used to scan LANs with only two nodes/points, up to networks with more than 500 nodes/points. Nmap also enables users to customize scanning techniques. Usually, a simple ping operation using the ICMP protocol can meet the usual needs; it can also sniff UDP or TCP ports deeply, down to the operating system used by the host; it can also record all the sniffing results in various formats of logs, for further analysis.)
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