ASP.NET is an entirely new technology for server-side scripting and not an upgraded version of ASP, but it’s the next generation of ASP. ASP.NET is the major part of the Microsoft’s .NET Framework. It was written from the ground up and is not backward compatible with classic ASP.
ASP.NET is a server side scripting technology that enables scripts (embedded in web pages) to be executed by an Internet server.
ASP.NET is a Microsoft technology, stands for Active Server Pages. ASP.NET is a program that runs inside IIS (Microsoft’s Internet server). IIS comes as a free component with Windows servers, and also a part of Windows 2000 and XP Professional.
ASP.NET 3.0 is not a new version of ASP.NET. It’s just the name for a new ASP.NET 2.0 framework library with support for Windows Presentation Foundation, Windows Communication Foundation, Windows Workflow Foundation; and Windows Card Space.