A manufacturing company is having issues with unauthorized access and modification of the
controls operating the production equipment. A communication requirement is to allow the free
flow of data between all network segments at the site. Which of the following BEST remediates the
issue?

A.
Implement SCADA security measures.

B.
Implement NIPS to prevent the unauthorized activity.

C.
Implement an AAA solution.

D.
Implement a firewall to restrict access to only a single management station.