Computer ports are actually represented by 16-bit integers, so the theoretical maximum number of ports is 2 16 = 65536.

It is recognized as 0- 1023, which mainly includes some public system services such as http service 80 and mail service 25.

The registered port is 1024-49 152, which is the default port of some third-party software.

And the random dynamic port is 49 152-65535, which can be freely used and dominated, such as when programmers need to test network communication.

* * * is port 65536.

The port number does not mean how to open it, but depends on which program you need to use the port. If you want to open a port, you just need to.

Just use the socket associated port in the program connection.