ASP.NET web pages: These are the web pages that are served to the user's browser. ASP.NET web pages are created using a combination of HTML, CSS, and server-side code, which can be written in C#

ASP.NET MVC: ASP.NET MVC is a framework for building web applications that separates the user interface from the application logic. It allows developers to create web pages using HTML and JavaScript, while the application logic is written in C#

ASP.NET Web API: ASP.NET Web API is a framework for building RESTful web services. It allows developers to create APIs that can be consumed by other applications.