An Nmap scan shows the following open ports, and nmap also reports that the OS guessing results to match too many signatures hence it cannot reliably beidentified: 21 ftp 23 telnet 80 http 443https What does this suggest ?
A.
This is a Windows Domain Controller
B.
The host is not firewalled
C.
The host is not a Linux or Solaris system
D.
The host is not properly patched
Explanation:
:
Why is the host not properly patched?
Is it because telnet is being used?
I guessed not firewalled since there are no closed ports, but that may be reading into the question too much.
I would say not firewalled is the correct answer. The most correct answer because even if the system is or is not patched it is for sure not blocking ports at the firewall level.
I guess is “C:The host is not a Linux or Solaris system”. If C isn’t the answer that the OS will be ‘Linux or solaris’. The normally case that nmap cannot determint target’s OS is NAT. Is NAT always Linux/Solaris? I don’t thing so!
So, I selected C.
I agree with the answer. D