In IIS (Internet Information Services), several default application pools are created during the installation process. These default application pools are used to host websites and web applications. The specific default application pools can vary depending on the version of IIS and the installed components. Here are some common default application pools in IIS:
1. DefaultAppPool: This is a commonly used default application pool in IIS. It is typically created during the installation of IIS and used as the default application pool for new websites unless specified otherwise. It runs under the "ApplicationPoolIdentity" by default.
2. Classic .NET AppPool: This default application pool is created when the IIS server includes support for running classic ASP.NET applications. It uses the .NET Framework's older pipeline mode known as "Classic" instead of the newer "Integrated" mode.
3. ASP.NET v4.0: If you have installed the .NET Framework and enabled ASP.NET, an application pool named "ASP.NET v4.0" may be created. It is used for hosting ASP.NET applications targeting the .NET Framework 4.0 or higher.
4. ASP.NET v2.0: Similarly, an application pool named "ASP.NET v2.0" can be created for hosting ASP.NET applications targeting the .NET Framework 2.0 or higher.
5. Default Web Site AppPool: In some versions of IIS, a default application pool named "Default Web Site AppPool" is created specifically for the default website (typically named "Default Web Site").
It's important to note that the specific default application pools can vary depending on the IIS version and configuration options chosen during installation. Additionally, custom application pools can be created and used based on specific requirements for websites and web applications hosted on the IIS server.