Answer :
Windows 2000 Server OS should you use
Explanation:
Microsoft developed Windows 2000 as part of the Windows NT operating system family.
Four versions of Windows 2000 are provided: Free, Regular, Advanced Application and Data centre Software.
Microsoft also sells Windows 2000 Limited Edition Enhanced Server and Data centre Server-Limited Edition launched in 2001 that runs with 64-bit Intel Itanium processors.
A new network of 15 workstations needs to be established.
The network infrastructure must be used concurrently for all 15 stations and Active Directory is required for use in that network.