FTP Protocol Overview

The File Transfer Protocol (FTP) is a standard client-server protocol used for transferring files between computers. FTP utilizes the Transmission Control Protocol (TCP) as its underlying transport mechanism and supports two operational modes: Active Mode and Passive Mode. The FTP protocol consists of two primary components: an FTP Client and an FTP Server.

An FTP Client is an application that allows users to connect to an FTP server and perform various file operations, such as uploading, downloading, deleting, renaming files, etc. Typically, the FTP client requires the user to provide a username and password for authentication in order to access files on the server.

An FTP Server is a computer program designed to listen for connection requests from FTP clients, process these requests, and provide access to files stored on the server. Administrators usually need to configure user accounts and file permissions within an FTP server to ensure security.

The FTP protocol defines a set of commands used for communication between the FTP client and the FTP server. These commands include login, listing directory contents, uploading, and downloading files, among others. The FTP protocol also specifies two transfer modes: ASCII Mode and Binary Mode, which determine how file data is formatted during transmission.

FTP is an older protocol that has been superseded by more modern alternatives such as SFTP (SSH File Transfer Protocol) and FTPS (FTP over SSL/TLS). These newer protocols build upon the foundation of FTP while offering enhanced security features and improved functionality.