I think that depends by your network configuration. I don't think that is a licenses issue.
----------------
Enterprise server
Refers to the server to which multiple primary domain controllers (PDCs) in a large organization will replicate.
----------------
Windows NT Server
Windows NT Server is the basic 32-bit Windows server platform. It offers a robust security structure along with basic file and print services. It's also designed to accommodate the various members of the BackOffice suite of server software. Windows NT Server is the basis of Windows NT Server Enterprise Edition and Terminal Server Edition.
Windows NT Server Enterprise Edition
While Windows NT Server is intended for small to midsize businesses, Windows NT Server Enterprise Edition is intended for large corporations. The advantage of Enterprise Edition is that it's designed to allow clustering. Clustering is a technology that enables multiple servers to work together as one, so they can distribute the workload.
Windows NT Server Terminal Server Edition
Windows NT Server Terminal Server Edition is intended to allow computers that aren't capable of running 32-bit Windows operating systems to do so. This is done through terminal emulation. The legacycomputers run a thin client that allows them to connect to the terminal server. Once connected, all software actually runs on the server. The client PC merely receives screen refreshes. Terminal Server Edition works similarly to the way that a mainframe works. All of the software runs on the mainframe, but screen updates are passed to each dumb terminal that's connected.
