How to resolve errors during the handshaking period in SQL Server?

There could be various reasons for errors during the handshake in SQL Server. Here are some common solutions to address the issue:

1. Check the network connection: make sure there is a stable connection between the server and the client. You can try using the ping command to test if the server is reachable. If the network connection is unstable, you may need to fix network issues.
2. Check firewall settings: Verify the configuration of the firewall on both the server and client to ensure that the port for SQL Server is allowed through. SQL Server typically uses port 1433 by default.
3. Check SQL Server configuration: Make sure SQL Server is properly configured to accept connections from clients. You can examine SQL Server’s network configuration and authentication settings.
4. Check the service status of SQL Server: Make sure that the SQL Server service is running and has not been stopped or disabled. You can check the status of the SQL Server service in the Windows Service Manager.
5. Check the client driver: If you are using ODBC or OLE DB drivers to connect to SQL Server, make sure the driver is correctly installed and compatible with the version of SQL Server.
6. Check the log files of SQL Server: examine the SQL Server error log files to find detailed information about handshake errors. The log files are typically located in the LOG folder within the SQL Server installation directory.
7. Update SQL Server and the operating system: If the above methods do not work, consider updating both to the latest versions to ensure that any potential handshake errors are resolved.

If the above methods still cannot solve the problem, we recommend consulting the official documentation of SQL Server or seeking help from relevant technical support.