基于FTP协议的服务扫描器，FTP服务扫描就是通过扫描查找提供FTP服务的主机。-FTP protocol-based services scanner, FTP service scan by scanning for the provide FTP service host.

本程序可以实现对FTP协议的服务进行扫描，是一个简易的程序(This procedure can be achieved on the FTP protocol service scanning, is a simple procedure)