Tobias has just installed Linux on a virtual machine in his company's data center. However, he isn't sure whether the image he installed from automatically has an SMTP server running. Which of the following tools might he use to verify whether an SMTP server package is running?
A) nmap
B) nslookup
C) Vulnerability scanner
D) NIDS

Question

Quizplus · Accepted Answer

nmap is a network scanning tool that can be used to discover services running on a host, including an SMTP server. It can scan the default SMTP port (25) among others to check if the service is active.

Tobias Has Just Installed Linux on a Virtual Machine in His