Qt6 ftp

FTP, which stands for File Transfer Protocol, is a standard network protocol used for transferring files between a client and a server on a computer network. It allows for the exchange of files over a TCP/IP network, such as the internet.

FTP operates on a client-server model, where the client initiates a connection to the server and requests to perform file operations such as uploading, downloading, renaming, and deleting files. The server responds to these requests and carries out the operations accordingly.

Here’s an example to illustrate how FTP works:

1. The client application (e.g., an FTP client software like FileZilla or WinSCP) establishes a connection to the FTP server by specifying the server’s IP address or domain name and the port number (usually port 21).
2. Once the connection is established, the client needs to authenticate itself to the server by providing valid credentials (username and password).
3. After successful authentication, the client can send commands to the server to perform various operations, such as listing the files and directories on the server, uploading a file from the client to the server, or downloading a file from the server to the client.
4. The server responds to each command with a status code and, if applicable, the requested data.
5. Once the file transfer is complete, the client can close the connection to the server.

FTP supports two modes of operation: Active mode and Passive mode. In Active mode, the server initiates the data connection with the client, while in Passive mode, the client initiates the data connection with the server. The choice of mode depends on the network configuration and firewall settings.

FTP is widely used for publishing web content, downloading software updates, sharing files, and managing remote servers. However, it has some security risks, such as transmitting data in plaintext, which can be intercepted by malicious actors. Therefore, it is recommended to use secure alternatives like SFTP (SSH File Transfer Protocol) or FTPS (FTP over SSL/TLS) to encrypt the data transfer.