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端口扫描
- 端口扫描能够用来查找目标主机已开放的端口,包括TCP和UDP端口。当前针对TCP端口的扫描技术有三种,分别为:全连接扫描,SYN扫描和FIN扫描。针对UDP端口的扫描技术一般是采用ICMP报文中端口不可达的信息来识别UDP端口是否开放。(Port scans can be used to find ports that have been opened by the target host, including TCP and UDP ports. There are three kinds o