No, you haven't entered a time warp - this blog post is about a guide for Windows Server 2008 R2 - and not for Windows Server 2012.
This guide was previously published only in HTML format, but now you can download the Windows Server 2008 R2 Core Network Companion Guide: Deploying 802.1X Authenticated Wireless Access with PEAP-MS-CHAP v2 from the Microsoft Download Center in Word format, at http://www.microsoft.com/en-us/download/details.aspx?id=35831
You can build on your core network by using this guide, which provides instructions on how to deploy Institute of Electrical and Electronics Engineers (IEEE) 802.1X-authenticated IEEE 802.11 wireless access by using Protected Extensible Authentication Protocol- Microsoft Challenge Handshake Authentication Protocol version 2 (PEAP-MS-CHAP v2).
The wireless access infrastructure detailed by this guide includes 802.1X-capable, 802.11 wireless access points (APs), and various Windows Server 2008 R2 features, such as Active Directory Domain Services Users and Computers, Group Policy Management, Network Policy Server (NPS) servers, and server certificates for computers that are running NPS.
In addition, the guide includes instructions for configuring wireless client computers that are running Windows 7, Windows Vista, or Windows XP with Service Pack 2.