The following illustration shows the four tiers of the network architecture in the Microsoft Dynamics NAV Web client.

The following table describes the components of each tier.
| Tier | Description | 
|---|---|
Device  | A computer or device that has access to the Internet with a browser. For a list of supported browsers, see System Requirements for Microsoft Dynamics NAV 2016.  | 
Web server  | A computer that is running Internet Information Services (IIS) at a minimum. Microsoft Dynamics NAV Web Server components are installed on a website on IIS. For more information, see How to: Install the Web Server Components.  | 
Microsoft Dynamics NAV Server  | A Microsoft .NET Framework-based Windows Service that manages communications and provides a security layer between clients and Microsoft Dynamics NAV databases in SQL Server. For more information, see Microsoft Dynamics NAV Server.  | 
Database  | A SQL Server database that contains Microsoft Dynamics NAV data. For more information, see SQL Server Database Components.  | 





