... problemwith FTP, which is that it sends the username and password as clear text. Many alternatives to FTP areavailable, including SCP, SFTP, and WebDAV.Other FTP ResourcesBernstein, D. J., FTP: File ... first few steps of FTP passive mode. FTP Protocol Analysishttp://www.troubleshootingnetworks.com/ftpinfo.html6 of 105/11/2011 10:02 PMAnalysis of the File Transfer Protocol (FTP) by Priscilla ... is passive FTP, in which case the client side establishesthe data connection. FTP and TCP Port Numbers FTP uses different TCP port numbers depending on whether active or passive FTP is in use....