Which of the following ports does IMAP use by default?

The correct answer is C. 143. IMAP (Internet Message Access Protocol) uses TCP port 143 by default for unencrypted communication, and port 993 for IMAP over SSL/TLS. Port 110 is used by POP3 (Post Office Protocol v3), another email retrieval protocol. Port 123 is used by NTP (Network Time Protocol). Port…

Networking concepts

Question

Options

A110
B123
C143
D443

How the community answered

(29 responses)

A
3% (1)
C
97% (28)

Explanation

IMAP (Internet Message Access Protocol) uses TCP port 143 by default for unencrypted communication, and port 993 for IMAP over SSL/TLS. Port 110 is used by POP3 (Post Office Protocol v3), another email retrieval protocol. Port 123 is used by NTP (Network Time Protocol). Port 443 is used by HTTPS. IMAP is preferred over POP3 in modern environments because it keeps mail on the server and allows synchronization across multiple devices.

Topics

#IMAP#port 143#email protocols#well-known ports

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