Several users are sending emails to CompTIA.org, but they are not being received. Which of the following commands could be used to verify that the company is able to connect to the mail service at CompTIA.org?
A.
ping
B.
arp
C.
dig
D.
telnet
Which of the following commands could be used to verify that the company is able to connect to the mail service at CompTIA.org?
Several users are sending emails to CompTIA.org, but they are not being received. Which of the following commands could be used to verify that the company is able to connect to the mail service at CompTIA.org?