CompTIA Security+ (SY0-601) — Question 455

A financial analyst is expecting an email containing sensitive information from a client. When the email arrives the analyst receives an error and is unable to open the encrypted message. Which of the following is the most likely cause of the issue?

Answer options

• A. The S/MIME plug-in is not enabled
• B. The SSL certificate has expired
• C. Secure IMAP was not implemented
• D. POP3S is not supported

Correct answer: A

Explanation

The correct answer is A because without the S/MIME plug-in enabled, the email cannot be decrypted, leading to the error. Options B, C, and D relate to different configurations or protocols that do not directly affect the ability to open an S/MIME encrypted email.