CompTIA Network+ (N10-009) — Question 9

Which of the following ports is used for secure email?

Answer options

• A. 25
• B. 110
• C. 143
• D. 587

Correct answer: D

Explanation

Port 587 is the standard port for sending email securely using SMTP with STARTTLS. Port 25 is typically used for unencrypted SMTP, while ports 110 and 143 are used for retrieving emails via POP3 and IMAP, respectively, and do not pertain to secure email sending.