File Transfer Protocol (FTP) is a standard network protocol used for transferring files between a client and a server on a computer network. It enables the exchange of files over the Internet or any network that supports TCP/IP (Transmission Control Protocol/Internet Protocol).
Key aspects of File Transfer Protocol (FTP) include:
- Client-Server Architecture: FTP operates on a client-server model, where a client computer initiates a connection to an FTP server to send or retrieve files. The client uses FTP client software (e.g., FileZilla, WinSCP) to connect to the server.
- Authentication: Users typically need valid credentials (username and password) to access an FTP server. Anonymous FTP access, allowing users to log in without authentication, might also be available on some servers for public file sharing.
- File Operations: FTP allows users to perform various file operations, such as uploading (sending) files from the client to the server, downloading (retrieving) files from the server to the client, renaming files, creating directories, deleting files, and modifying file permissions.
- Two Modes of FTP: FTP operates in two modes: the default mode is the “Control” or “Command” channel, which manages commands, authentication, and control information. The second mode is the “Data” channel, which handles the actual transfer of files.
- Modes of Transfer: FTP supports two primary modes of file transfer: ASCII mode, suitable for text files and transferring data without changing the format, and Binary mode, used for transferring non-text files (e.g., images, executables) without any alteration.
- Security Concerns: Standard FTP transfers data in plain text, which can pose security risks as sensitive information, including login credentials, can potentially be intercepted. Secure FTP variants like FTPS (FTP Secure) and SFTP (SSH File Transfer Protocol) employ encryption for secure data transmission.