CompTIA A+ Core 2 (220-1102) — Question 28

A user is unable to log in to the network. The network uses 802.1X with EAP-TLS to authenticate on the wired network. The user has been on an extended leave and has not logged in to the computer in several months. Which of the following is causing the log-in issue?

Answer options

• A. Expired certificate
• B. OS update failure
• C. Service not started
• D. Application crash
• E. Profile rebuild needed

Correct answer: A

Explanation

The correct answer is A, as 802.1X with EAP-TLS relies on valid certificates for authentication, and an expired certificate would prevent the user from logging in. The other options do not directly relate to the authentication mechanism in use; an OS update failure, service not started, application crash, or needing a profile rebuild would not specifically cause a failure in certificate-based authentication.