This is a web server software developed by nginx, originally created by Igor Sysoev. It was released in 2004 under the BSD license and has since become one of the most widely used web servers globally. Nginx's primary function is to handle HTTP traffic by parsing the client request, analyzing its headers, and modifying or routing responses according to specific rules provided in the server configuration files. The software supports various protocols, including TCP, UDP, HTTP/1.1, HTTP/2, and others. Its efficiency and reliability have made it a popular choice for web applications serving large volumes of traffic due to its high performance and scalability capabilities. It also has several security features to protect against common web attacks.