All throughout this chapter, we have been discovering modules that help you improve or fine-tune the configuration of your web server. Nginx fiercely stands up to other concurrent web servers in terms of functionality, and its approach to virtual hosts and the way they are configured will probably convince many administrators to make the switch.
Three additional modules were left out, though. Firstly, the FastCGI module will be approached in the next chapter, as it will allow us to configure a gateway to applications such as PHP or Python. Secondly, the proxy module that lets us design complex setups will be described in Chapter 7, Apache and Nginx Together. Finally, the Upstream module is tied to both, so it will be detailed in parallel.