What is the use of having a "TCP type" in qq advanced settings?

Computer "port" is a free translation of English port, which can be regarded as the export of computer communication with the outside world. Tencent's port is relative to an interface, and the port connected to the computer is like the door of the computer. Every communication software must visit and chat with each other through ports, and the port number of QQ is its data communication port.

Tencent QQ communication protocol port range

By default, QQ adopts UDP communication mode, with port 8000,8001. If the two ports of UDP are disconnected, it will automatically switch to TCP 80 port or TCP 443 port for communication. QQ also supports HTTP proxy mode and SOCK5 proxy mode. There are many kinds of QQ port numbers, but mainly UDP4000, 8000, TCP80, 443 and so on.