You are a consumer support technician.
A customer reports that she cannot send e-mail to her mail server from a Windows Vista computer. You identify that the customer connects to the mail server by using SMTP.
You need to identify if the ports used by the SMTP server are open.
What should you do first?
A.
Turn on the Telnet Client feature.
B.
Turn on the Telnet Server feature.
C.
Turn on the TFTP Client feature.
D.
Start the Application Layer Gateway Service service.