There are only a handful of companies that are currently producing a connection broker product. If you dig through the documentation from HP, IBM, and others they mention this “optional” magical box that serves as the bridge between the client devices and the hypervisors. Very few of these vendors who are pushing VDI have come forward and presented a solid connection broker component, which I would consider to be one of the most critical components of VDI. I have listed them here for convenience in evaluating end-to-end VDI solutions.