If you work for a Cloud Service Provider or an Enterprise network, you might be interested in learning how to use Hyper-V Network Virtualization; if so, check out this test lab guide:

Test Lab Guide: Windows Server 2012 R2 Hyper-V Network Virtualization with System Center 2012 R2 VMM

This guide, which is available in the Microsoft Download Center in Word format, provides instructions to create the Windows Server 2012 R2 Network Virtualization with System Center 2012 R2 Virtual Machine Manager (VMM) test lab, using computers running Windows Server 2012 R2.