Although overarching network virtualization efforts are still on the drawing board, three virtualization technologies are already available. Below is a breakdown of these bleeding-edge network services and their components.
| What’s being shared | Related technology | Primary protocol | How clients connect | Intermediate layer |
| Storage space | Storage area networking | iSCSI | Storage “host adapter” andsoftware driver | Storage virtualization switch |
| Processing power | Grid computing | Proprietary according to processor manufacturer | Software agent | Master control software |
| Application services | Web services | eXtensible Markup Language | Programming interface | Web application server |
For more information on network virtualization, the Fibre Channel Industry Association offers a white paper that spells out the benefits of storage virtualization.In addition, Grid Computing Planet provides links to grid resources. The Web Services Interoperability Organization (WS-I) provides information on distributed application services initiatives.
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