NETWORK ~ FTP Protocol 📂

 

    The File Transfer Protocol (FTP) is a client/server protocol used to transfer or exchange files with a host computer.

    The client can be authenticated with a user name and password. Anonymous FTP allows users to access files without the need for a user ID or password.

    Websites are sometimes designed to allow users to use "anonymous" or "guest" as a user ID and an email address as a password. Publicly accessible files are often found in a directory called "pub" and can easily be sent via FTP to a user's computer. FTP is also the Internet standard for moving or transferring files from one computer to another over TCP or IP networks.

FTP port:

    Since FTP is different from other client-server applications, it establishes two connections between the communicating hosts. One connection for data transfer, and the other for control (command and response). FTP is more efficient than other client-server applications because it has a different connection for data and commands.

The FTP protocol establishes a control connection on TCP port 21 and a data connection on TCP port 20.

FTP commands:

Command	Description
USER         ====>	Identify yourself to the server
PASS          ====>	Authenticate with the server
CWD          ====>	Change working directory
PWD          ====>	Print working directory
MKD          ====>	Make a directory
RMD          ====>	Remove a directory
DELE         ====>	Delete a file
RNFR        ====>	Rename from
RNTO        ====>	Rename to
LIST          ====>	List files in a directory
RETR        ====>	Retrieve a file from the server
STOR        ====>	Store a file on the server
SYST         ====>	Show server system type
QUIT        ====>	Close the connection

 

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