SNCF — Securing Networks with Firepower — Question 288

An engineer must configure email notifications on Cisco Secure Firewall Management Center. TLS encryption must be used to protect the messages from unauthorized access. The engineer adds the IP address of the mail relay host and must set the port number. Which TCP port must the engineer use?

Answer options

• A. 25
• B. 389
• C. 465
• D. 587

Correct answer: D

Explanation

The correct answer is D, as TCP port 587 is specifically designated for sending emails securely using TLS encryption. Port 25 is typically used for unencrypted SMTP traffic, while port 465 is also associated with SMTPS but is less commonly used. Port 389 is designated for LDAP, which is unrelated to email transmission.