200-201 Question #94: Real Exam Question with Answer & Explanation

Question

Refer to the exhibit. What does the output indicate about the server with the IP address 172.18.104.139?

Options

• Aopen ports of a web server
• Bopen port of an FTP server
• Copen ports of an email server
• Drunning processes of the server

Explanation

The output indicates that the server with IP address 172.18.104.139 has several open ports commonly associated with email services, suggesting it functions as an email server.

Common mistakes.

• A. Web servers typically listen on ports 80 (HTTP) and 443 (HTTPS), and while these might also be open, the specific combination of email-related ports is more definitive.
• B. FTP servers typically listen on ports 20 (data) and 21 (control), which are not primarily indicative of an email server.
• D. The output of commands like netstat or nmap primarily reveals network connection statuses and open ports, not the running processes themselves.

Concept tested. Common network ports and services

Reference. https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/standard-port-numbers-for-tcp-ip

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