SK0-004 · Question #144
Users on multiple network segments report that they are unable to retrieve email from a server. Which of the following commands will allow a server technician to ensure that the email service is…
The correct answer is D. netstat. The netstat command displays active network connections and listening ports, allowing a technician to confirm whether the email service is actively listening on its expected port.
Question
Users on multiple network segments report that they are unable to retrieve email from a server. Which of the following commands will allow a server technician to ensure that the email service is running on the server?
Options
- Aifconfig
- Bipconfig
- Cnbtstat
- Dnetstat
How the community answered
(50 responses)- A2% (1)
- B6% (3)
- C2% (1)
- D90% (45)
Why each option
The netstat command displays active network connections and listening ports, allowing a technician to confirm whether the email service is actively listening on its expected port.
ifconfig displays network interface configuration on Linux/Unix systems but provides no information about which services or ports are active on the server.
ipconfig displays IP address and network adapter configuration on Windows hosts but does not show service or port status.
nbtstat displays NetBIOS over TCP/IP statistics and name tables, which are unrelated to determining whether an email service is running and listening.
netstat shows all active TCP/UDP connections and listening ports on the server, so a technician can verify that the email service is running by confirming its associated ports - such as SMTP on 25, IMAP on 143, or POP3 on 110 - appear in a LISTENING state. Because users on multiple network segments are affected, the issue is server-side, and netstat directly reveals whether the service process is bound to a port and accepting connections. This makes it the correct tool for confirming service availability rather than network configuration.
Concept tested: Using netstat to verify service port availability
Source: https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/netstat
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