[ftp] FTP/SFTP/FTPS 의 차이점

셋 다 다르다!!!

FTP – should be only used for the plain old FTP protocol.

      - 일반적으로 우리가 아는 FTP

SFTP – should be only used for SFTP, the SSH file transfer protocol. However, people often shorten Secure FTP into SFTP - this is not correct, because the S in SFTP does not stand for Secure, but for SSH.

      FTP 프로토콜이 아님!!! 정식명칭은 SSH File Transfer Protocol. 약자로 SFTP로 불림.

Secure FTP – this name is the most confusing, because it is used to refer to either of the two different protocols. Whenever this name is used, it is necessary to specify whether the SSH-based or SSL-based file transfer protocol is meant.

      - FTPS, FTP-Secure 등으로 불림. Plain FTP over TLS/SSL channel. FTP 인데 TLS/SSL 을 거쳐서 안전하게 된 것. 

참고: http://www.zehon.com/index.html

http://en.wikipedia.org/wiki/FTPS