A server administrator suspects that an unauthorized email relay agent is running on a web server. The web server has a hostname of web1.example.com and an IP address of 199.90.89.51. Which of the following commands should the server administrator execute to verify these suspicions?
A) telnet web1.example.com 25
B) telnet web1.example.com 23
C) telnet 199.90.89.51
D) telnet 199.90.89.51 80

Question

Quizplus · Accepted Answer

To check for an unauthorized email relay agent, the administrator should connect to the SMTP port, which is port 25.

A Server Administrator Suspects That an Unauthorized Email Relay Agent