200-201 Question #164: Real Exam Question with Answer & Explanation

Question

Refer to the exhibit. What does this output indicate?

Options

• AHTTPS ports are open on the server.
• BSMB ports are closed on the server.
• CFTP ports are open on the server.
• DEmail ports are closed on the server.

Explanation

The output indicates that the server is not listening on the standard ports associated with email services, implying these ports are closed.

Common mistakes.

• A. If HTTPS ports (e.g., 443) were open, the output would show this port in a "LISTENING" state, contradicting the correct answer which implies closure of other ports.
• B. If SMB ports (e.g., 139, 445) were closed, the output would explicitly show them as not listening or being blocked, but this option specifies SMB, not email.
• C. If FTP ports (e.g., 20, 21) were open, the output would show these ports in a "LISTENING" state, which would mean FTP services are active.

Concept tested. Network port status interpretation

Reference. https://nmap.org/book/man-briefoptions.html

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