You need Windows Server 2012 installation media, either in the form of an .iso file (if you will be performing the practice exercises using virtual machines running on a Hyper-V host) or bootable DVD media (if you will be performing the practice exercises using physical systems).

You should have a server system available for testing purposes that meets the minimum hardware requirements for installing Windows Server 2012. The server system should have no operating system installed, and it can be either a physical system or a virtual machine running on a Hyper-V host. The network where the server resides should have Internet connectivity.