SK0-003 · Question #888
While a technician is setting up SMTP on a server, users are reporting that emails are not being transmitted. The technician logs into the mail server and successfully pings internal and external reso
The correct answer is C. Firewall. Since the server can resolve names and ping resources, network connectivity is established, implying that a firewall is likely blocking the SMTP server's outbound email traffic on its designated port.
Question
While a technician is setting up SMTP on a server, users are reporting that emails are not being transmitted. The technician logs into the mail server and successfully pings internal and external resources by name. Which of the following needs to be configured to allow outbound traffic?
Options
- AWeb server
- BDNS
- CFirewall
- DDHCP
How the community answered
(30 responses)- A7% (2)
- B7% (2)
- C70% (21)
- D17% (5)
Why each option
Since the server can resolve names and ping resources, network connectivity is established, implying that a firewall is likely blocking the SMTP server's outbound email traffic on its designated port.
A web server handles HTTP/HTTPS traffic for serving web content and is unrelated to outbound email transmission via SMTP.
DNS is responsible for resolving hostnames to IP addresses; since the technician can successfully ping internal and external resources by name, DNS is already functioning correctly.
A firewall is used to control network traffic based on configured rules, and if outbound SMTP traffic (typically on port 25 or 587) is not explicitly allowed, the firewall will block the emails from being transmitted, even if general network connectivity exists.
DHCP assigns IP addresses and network configuration, and its proper functioning is implied by the server's ability to ping resources.
Concept tested: Troubleshooting SMTP outbound firewall rules
Source: https://learn.microsoft.com/en-us/windows/security/threat-protection/windows-firewall/windows-firewall-with-advanced-security-overview
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