After the database server service is started, it will apply for several ports for interaction. Generally, the ports for interaction with the client are 1 and 2.

If the client and the server are not on the same machine, then the port on the server is an interactive port published by DB, and the port on the client is a data access port, that is, it is possible that the port on the client is 1433 and the port on the server is 29 14.