easy
Single Answer
0Which protocol and port number is associated with SMTP?
Answer Options
A
UDP/69
B
UDP/68
C
UDP/53
D
TCP/25
Correct Answer: D
Explanation
The Simple Mail Transfer Protocol (SMTP) uses TCP port 25 to send mail. The Trivial File Transfer Protocol (TFTP) uses UDP/69 for communications. The Dynamic Host Configuration Protocol (DHCP) uses UDP/68 for communications. The Domain Name protocol uses UDP/53 for communications.
smtp
tcp
ports
application-layer
email