端口是信息进出任何系统的点。扫描端口以发现系统中的任何环形孔称为端口扫描。系统中可能存在黑客攻击和获取关键信息的弱点。这些点应该被识别并防止任何滥用。常见的Port Scanning类型：

　　1、Strobe: Scanning of known services.

　　2、UDP: Scanning of open UDP ports

　　3、Vanilla: In this scanning the scanner attempts to connect to all 65,535 ports.

　　4、Sweep: The scanner connects to the same port on more than one machine.

　　5、Fragmented packets: The scanner sends packet fragments that get through simple packet filters in a firewall

　　6、Stealth scan: The scanner blocks the scanned computer from recording the port scan activities.

　　7、FTP bounce: The scanner goes through an FTP server in order to disguise the source of the scan.

　　更多关于网络安全培训的问题，欢迎咨询千锋教育在线名师。千锋教育拥有多年IT培训服务经验，采用全程面授高品质、高体验培养模式，拥有国内一体化教学管理及学员服务，助力更多学员实现高薪梦想。