Hey everyone, I am setting up a virtual lab on a desktop system and I am wanting to play around with hacking and security but I am not sure where to begin.

Currently I have a Windows XP, 7, 8 and Server 2012 virtual machine and I am wanting to connect them to the same virtual network so they all can communicate and just do different experiments on them. Would anyone be very familiar with virtualization and be able to help me out and answer a few questions I have?