Computer-Networks
August 30, 2024
Computer-Networks
August 30, 2024
Computer-Networks
August 30, 2024
Computer-Networks
August 30, 2024

Computer-Networks

Question 738
Which of the following protocol is used for transferring electronic mail messages from one machine to another?
A
HTTP
B
FTP
C
SMTP
D
SNMP
Question 738 Explanation: 
→ Mail servers and other mail transfer agents use SMTP to send and receive mail messages on TCP port 25.
→ SMTP (Simple Mail Transfer Protocol) is a TCP/IP protocol used in sending and receiving e-mail.
→ However, since it is limited in its ability to queue messages at the receiving end, it is usually used with one of two other protocols, POP3 or IMAP, that let the user save messages in a server mailbox and download them periodically from the server.
→ In other words, users typically use a program that uses SMTP for sending e-mail and either POP3 or IMAP for receiving email.
Correct Answer: C
Question 738 Explanation: 
→ Mail servers and other mail transfer agents use SMTP to send and receive mail messages on TCP port 25.
→ SMTP (Simple Mail Transfer Protocol) is a TCP/IP protocol used in sending and receiving e-mail.
→ However, since it is limited in its ability to queue messages at the receiving end, it is usually used with one of two other protocols, POP3 or IMAP, that let the user save messages in a server mailbox and download them periodically from the server.
→ In other words, users typically use a program that uses SMTP for sending e-mail and either POP3 or IMAP for receiving email.
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