Working with Network Protocols

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As part of configuring the appropriate DBExpress or ODBC driver, you might need to specify the network protocol for the server, such as TCP/IP, depending on the driver’s configuration options. In most cases, network protocol configuration is handled using a server’s client setup software. For ODBC it might also be necessary to check the driver setup using the Microsoft ODBC Administrator. See Programming Applications with ODBC for more information.

Establishing an initial connection between client and server can be problematic. The following troubleshooting checklist should be helpful if you encounter difficulties:

  • Is your server’s client-side connection properly configured?
  • If you are using TCP/IP:
  • Is your TCP/IP communications software installed? Is the proper WINSOCK.DLL installed?
  • Is the server’s IP address registered in the client’s HOSTS file?
  • Is the Domain Name Service (DNS) properly configured?
  • Can you ping the server?
  • Are the DLLs for your connection and database drivers in the search path?

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