210-255 Question #183: Real Exam Question with Answer & Explanation

The correct answer is D: open ports of an email server. The scan output for 172.18.104.139 shows open ports associated with email server protocols such as SMTP, POP3, and IMAP.

Question

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

Exhibit

Options

Aopen port of an FTP server
Bopen ports of a web server
Crunning processes of the server
Dopen ports of an email server

Explanation

The scan output for 172.18.104.139 shows open ports associated with email server protocols such as SMTP, POP3, and IMAP.

Common mistakes.

A. FTP servers use ports 20 and 21; the output does not show these ports open on the target host.
B. Web servers primarily expose ports 80 (HTTP) and 443 (HTTPS), which are not the ports shown in the exhibit output.
C. Running processes are displayed via OS-level commands such as 'ps' or 'tasklist', not port scan output.

Concept tested. Identifying email server from open port scan output

Reference. https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml

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