The applications that you deploy may require a set of supportive services, such as Message Queuing or Distributed Transactions support. The section of the Add Roles Wizard that adds the Application Server role includes a page for selecting the role services that are required to run your applications.
You can install the following role services, or support for these services, during Application Server installation:
- Web Server (IIS) support: Application
Server uses Web server support through Internet Information
Services (IIS) to host internal or external Web sites and Web
services that communicate over Hypertext Transfer Protocol (HTTP).
This includes support for applications that are built on Microsoft
ASP.NET that can be accessed through a Web browser. It also
includes support for Web services that are built with Windows
Communication Foundation (WCF). For more information, see Web Server (IIS) Support
for Application Server.
- COM+ Network Access: Application
Server uses COM+ Network Access to host and allow remote invocation
of applications that are built with COM+ and Enterprise Services
components. For more information, see COM+ Network Access and
- TCP Port Sharing: TCP Port Sharing
facilitates the sharing of TCP ports across multiple processes that
use WCF for communications. The default TCP port for sharing is
port 808. For more information, see TCP Port Sharing and
- Windows Process Activation Service
support: Application Server uses Windows Process Activation
Service (WAS) support to invoke applications remotely over the
network using protocols such as HTTP, Message Queuing, TCP, and
Named Pipes. For more information, see Windows Process
Activation Service Support for Application Server.
- Distributed Transactions: Distributed
Transactions helps ensure complete and successful transactions over
multiple databases that are hosted on multiple computers on your
network. For more information, see Distributed Transaction
Support for Application Server.
Some role services require the installation of a supporting feature or set of features. If this is the case, you have the option to install or not install the required feature or set of features.