Multi-Tier Deployment Model
With this model, if you will be using, for example, a Windows, IBM i or Linux Web Server with a Windows Application Data Server:

• The Visual LANSA development environment is installed on the Data/Application Server. The LANSA Repository (including the generated HTML) and your application data are installed on this machine. 
• The Web PC-based Administrator will only need to connect to the Data/Application Server.
• A Visual LANSA system is not required on the Windows Web Server. Only the appropriate Web Plug-in needs to be installed on the Web Server.
• A Windows Web Server will use the LANSA Web Server Extension
• An IBM i or Linux Web Server will use the LANSA Apache Plug in.

Mixed Multi-Tier Deployment Model
In this model, and assuming, for example, that you are using a Windows Web Server with an IBM i Application Data Server:

• The Web development environment is installed on the Data/Application Server along with LANSA for i. The LANSA Repository (including the generated HTML) and your application data are installed on the Data/Application Server.
• The Web PC-based Administrator will only need to connect to the Data/Application Server.
• A Visual LANSA system is not required on the Web Server. Only the LANSA Web Server Extension needs to be installed on the Web Server.
• A Windows Web Server will use the LANSA Web Server Extension
• A Linux or IBM i Web Server will use the LANSA Apache Plug in.
• A Listener must be configured on an IBM i Data/Application Server for the communications link from a Windows Web Server.
• Refer to the Web Administrators Guide for set up instructions for Multi-Tier Deployment.