Which web server is NOT used in Appian architecture?

In Appian architecture, Nginx is not typically employed as a web server. Instead, Appian often relies on other established servers, such as Apache and Microsoft Internet Information Services (IIS). These web servers are commonly used in enterprise environments to host applications and provide functionalities such as load balancing and security.

Apache is well-known for its flexibility and robust features, making it a popular choice for many web applications, including Appian. Similarly, Microsoft IIS integrates effectively with other Microsoft technologies, providing seamless service in Windows-based environments, which is beneficial in many corporate scenarios.

While Nginx is a powerful web server that is highly efficient for serving static content and balancing load, Appian does not specifically incorporate it into its architecture as per the typical configurations recommended by the platform. This is why the correct response identifies Nginx as the web server not utilized in Appian architecture.