FTP or Flie Transfer Protocol is a standard network protocol used to exchange and manipulate files over an internet protocol computer network such as the internet.
It is built on a client- server structure and uses separate control and data connections between the client and server applications.
It's purpose is to promote sharing of files (computer programs and/or data)
To transfer data reliably and efficiently
To encourage indirect or implicit use of remote computers
To shield a user from variations in file storage systems among different hosts.
FTP commands and transferred files can be captured using a packet sniffer, if on the same network. This is a problem to many Internet protocol specifications written prior to the creation of SSL, SMTP and Telnet. The solution to this problem is to used either SFTP (SHH File transfer Protocol) or FTPS which adds a SSL or TLS encryptions to FTP protocol.
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