Clients and servers communicate through a connection. For a client application to connect to a server application, the server application must be listening for the client connection request.
To establish a connection, Open Client:
Uses DSQUERY environment variable to determine the name of the target server. Use DSQUERY only if the Open Client application does not specify the name of the target server. If specified in both, the DSQUERY and the application, the application designation takes precedence.
Uses a directory service or the interfaces file to obtain the target server’s address.
DB-Library can only look
up servers using the interfaces file.
To listen for a connection request, Open Server:
Uses the DSLISTEN environment variable to determine the name of the Open Server application.
Uses a directory service or the interfaces file to determine the Open Server application’s address.
Use DSLISTEN only
if the Open Server application does not specify a server during
initialization.
