CompTIA SecurityX (CAS-005) — Question 21

A company has data it would like to aggregate from its PLCs for data visualization and predictive maintenance purposes. Which of the following is the most likely destination for the tag data from the PLCs?

Answer options

• A. External drive
• B. Cloud storage
• C. System aggregator
• D. Local historian

Correct answer: D

Explanation

The Local historian is designed specifically to store and manage time-series data from PLCs for analysis and reporting, making it the ideal choice for this scenario. While cloud storage and external drives can store data, they are not tailored for real-time data aggregation and analysis like a local historian. A system aggregator typically refers to a solution that consolidates data from multiple sources, but does not hold the data itself.