Which of the following ports is used by the IMAP4 protocol?

A.
443

B.
53

C.
143

D.
110

Explanation:
Port 143 is used by the IMAP4 protocol.

Answer A is incorrect. Port 443 is used by the HTTPS protocol.

Answer B is incorrect. Port 53 is used by DNS.

Answer D is incorrect. Port 110 is used by the POP3 protocol.