Which of the following historian server locations will allow the business to get the required reports in an ОТ and IT environment?

An energy company is required to report the average pressure of natural gas used over the past quarter. A PLC sends data to a historian server that creates the required reports.

Which of the following historian server locations will allow the business to get the required reports in an ОТ and IT environment?
A . In the ОТ environment, use a VPN from the IT environment into the ОТ environment.
B . In the ОТ environment, allow IT traffic into the ОТ environment.
C . In the IT environment, allow PLCs to send data from the ОТ environment to the IT environment.
D . Use a screened subnet between the ОТ and IT environments.

View Answer

Answer: D

Explanation:

A screened subnet is a network segment that separates two different environments, such as ОТ (operational technology) and IT (information technology), and provides security controls to limit and monitor the traffic between them. This would allow the business to get the required reports from the historian server without exposing the ОТ environment to unnecessary risks. Using a VPN, allowing IT traffic, or allowing PLCs to send data are less secure options that could compromise the ОТ environment.

Verified Reference:

https://www.comptia.org/blog/what-is-operational-technology https://partners.comptia.org/docs/default-source/resources/casp-content-guide