CompTIA Server+ (SK0-005) — Question 312

A server administrator needs to harden a server by only allowing secure traffic and DNS inquiries. A port scan reports the following ports are open:
443
636
Which of the following open ports should be closed to secure the server properly? (Choose two.)

Answer options

• A. 21
• B. 22
• C. 23
• D. 53
• E. 443
• F. 636

Correct answer: A, C

Explanation

The correct ports to close are 21 and 23, as they are associated with FTP and Telnet, which are not secure. Ports 443 and 636 are already in use for secure HTTPS and LDAPS traffic, so they should remain open.