200-201 · Question #94
Refer to the exhibit. What does the output indicate about the server with the IP address 172.18.104.139?
The correct answer is C. open ports of an email server. 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.
Question
Refer to the exhibit. What does the output indicate about the server with the IP address 172.18.104.139?
Exhibit
Options
- Aopen ports of a web server
- Bopen port of an FTP server
- Copen ports of an email server
- Drunning processes of the server
How the community answered
(44 responses)- A5% (2)
- B7% (3)
- C75% (33)
- D14% (6)
Why each option
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.
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.
FTP servers typically listen on ports 20 (data) and 21 (control), which are not primarily indicative of an email server.
The presence of listening ports such as 25 (SMTP), 110 (POP3), 143 (IMAP), 465 (SMTPS), 587 (Submission), 993 (IMAPS), and 995 (POP3S) strongly indicates that the server is running email services. These ports are standard for sending, receiving, and accessing email.
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
Source: https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/standard-port-numbers-for-tcp-ip
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