> For the complete documentation index, see [llms.txt](https://cookbook.denovolab.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cookbook.denovolab.com/installation/distributed-architecture.md).

# Distributed Architecture

Each DNL Class 4 Fusion consists of the following three parts:

* Web UI
* Switch Backend
* Database

You can install Web UI, Switch Backend, and Database with multiple servers to enforce redundancy and high availability. 

This section discusses how you can do build this configuration.