A security administrator is reviewing logs and notices multiple attempts to access the HVAC controls by a workstation with an IP address from the open wireless network. Which of the following would be the best way to prevent this type of attack from occurring again?
A. Implement VLANs to separate the HVAC
B. Enable WPA2 security for the wireless network
C. Install a HIDS to protect the HVAC system
D. Enable Mac filtering for the wireless network