Kestrel is a lightweight, cross-platform web server that is used as the default web server in ASP.NET Core. It is designed to be fast, scalable, and efficient, making it well-suited for hosting web applications built with ASP.NET Core.

Here are some key points about Kestrel:

Cross-platform: Kestrel is built to be cross-platform, which means it can run on different operating systems such as Windows, Linux, and macOS. This cross-platform nature allows developers to deploy ASP.NET Core applications to various environments without the need for modification.

High performance: Kestrel is optimized for high-performance web applications. It leverages asynchronous programming and is designed to efficiently handle a large number of concurrent connections. This makes it well-suited for applications that require handling high loads and heavy traffic.

Integration with ASP.NET Core: Kestrel is tightly integrated with ASP.NET Core, serving as the underlying web server for hosting ASP.NET Core applications. It can be used standalone or in combination with reverse proxies like Nginx or IIS to handle requests and serve static files efficiently.

Configuration and customization: Kestrel can be configured and customized to suit specific application requirements. You can configure settings like port number, SSL certificates, and server limits to optimize performance and security. Additionally, you can extend Kestrel by adding middleware components to handle various aspects of the request pipeline.

Reverse proxy support: Kestrel is often used in combination with a reverse proxy, such as Nginx or IIS. A reverse proxy can handle tasks like load balancing, caching, and SSL termination, while Kestrel focuses on serving dynamic content. This combination provides a flexible and scalable architecture for hosting ASP.NET Core applications.

Development-friendly: Kestrel is designed to be developer-friendly, making it easy to run and debug ASP.NET Core applications locally during development. It integrates well with development tools and frameworks, providing a smooth development experience.

Overall, Kestrel is a lightweight, high-performance web server that is the default choice for hosting ASP.NET Core applications. Its cross-platform nature, performance optimizations, and seamless integration with ASP.NET Core make it a reliable and efficient option for serving web applications.

Kestrel is a cross platform,light weight,high performance web server in asp.net core which is by default included.

Kestrel ASP.NET Core is a cross-platform framework.it supports to development and run applications on different types of operating systems such as Windows, Linux, or Mac.