Which of the following protocol pairs can be used to send and retrieve e-mails (in that order)?

Q. Which of the following protocol pairs can be used to send and retrieve e-mails (in that order)?

(A) IMAP, POP3

(B) SMTP, POP3

(C) SMTP, MIME

(D) IMAP, SMTP

Ans: SMTP, POP3

Solution:

SMTP is push protocol and send e-mail and
POP3 is pull protocol i.e. to retrieve e-mail.