NGINX is a high-performance, open-source web server and reverse proxy server designed to handle large volumes of network traffic efficiently. Originally created to solve the C10k problem (handling 10,000 concurrent connections), NGINX is widely used for serving static content, load balancing, and acting as a gateway for HTTP, HTTPS, and other protocols. Its event-driven, asynchronous architecture allows it to process multiple requests simultaneously with minimal resource consumption. NGINX is commonly deployed to improve website speed, reliability, and scalability. It also supports features like SSL/TLS termination, caching, compression, and security controls. Many organizations use NGINX as a front-end proxy to distribute traffic across multiple backend servers, ensuring high availability and fault tolerance. Its configuration is flexible and modular, making it suitable for small websites as well as large-scale enterprise applications.