CompTIA Exam CAS-003 Topic 10 Question 46 Discussion

The Chief Information Officer (CIO) asks the systems administrator to improve email security at the company based on the following requirements:

1. Do not use two-factor authentication.

2. Protect the contents of a user's mailbox.

3. Be able to sign emails digitally.

4. Protect internal users from spoofing.

5. Secure communications in transit.

6. Use a hierarchically validated certifier for key exchange.

7. Do not use additional plug-in.

8. Have minimal impact to the end-user experience.

Which of the following, when used together, should the systems administrator implement to BEST meet the objectives? (Select TWO).