You have initiated an active operating system fingerprinting attempt with nmap against a target
system:
What operating system is the target host running based on the open ports shown above?
A.
Windows XP
B.
Windows 98 SE
C.
Windows NT4 Server
D.
Windows 2000 Server
Explanation:
The system is reachable as an active directory domain controller (port 389,LDAP)
D