Read this blog entry to see the software and hardware requirements for KN on the client and server ends....

We have now opened availability of the Knowledge Network Technical Refresh (KN TR) for selected organizations on our new Microsoft Connect site. The KN TR bits are available for self-support only which means the KN team is not available to support you in your evaluation. If you are interested in the KN team considering your organization for gaining access to the KN TR, please use the Contact Us button at the bottom of this blog and we’ll get back to you with a set of questions. ...