What do you conclude from the nmap results below?

What do you conclude from the nmap results below?

Staring nmap V. 3.10ALPHA0 (www.insecure.org/map/)

(The 1592 ports scanned but not shown below are in state: closed)

Port State Service

21/tcp open ftp

25/tcp open smtp

80/tcp open http

443/tcp open https

Remote operating system guess: Too many signatures match the reliability guess the OS. Nmap run completed C 1 IP address (1 host up) scanned in 91.66 seconds
A . The system is a Windows Domain Controller.
B . The system is not firewalled.
C . The system is not running Linux or Solaris.
D . The system is not properly patched.

View Answer

Answer: B

Explanation:

There is no reports of any ports being filtered.