Qt provides the
QHttp classes for working with FTP and HTTP. These protocols are easy to use for downloading and uploading files and, in the case of HTTP, for sending requests to web servers and retrieving the results.
Qt also provides the lower-level
QUdpSocket classes, which implement the TCP and UDP transport protocols. TCP is a reliable connection-oriented protocol that operates in terms of data streams transmitted between network nodes, and UDP is an unreliable connectionless protocol ...