CompTIA Security+ (SY0-501) — Question 428

A security consultant is setting up a new electronic messaging platform and wants to ensure the platform supports message integrity validation.
Which of the following protocols should the consultant recommend?

Answer options

• A. S/MIME
• B. DNSSEC
• C. RADIUS
• D. 802.11x

Correct answer: A

Explanation

S/MIME is designed specifically for securing email messages, providing integrity, authentication, and encryption, making it the correct choice. DNSSEC is focused on securing DNS data, RADIUS is used for network access control, and 802.11x pertains to wireless network security, none of which directly address message integrity in electronic messaging.