What is the architecture of SharePoint?

SharePoint has a 3 tier architecture which is as follows:
  • Web Server Front End
    In this layer SharePoint is loaded and configured, the web sites resides in the IIS and we have 14-hive structure.
  • Application Layer
    SharePoint provides various types of services, these services like the my site hosting, search, user profile and properties are hosted in this layer. Each of these services can be hosted in a separate machine if the need be.
  • Database Layer
    This is the layer where we have the database resides.

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