Q's Flashcards
Explain the role and function of the Perception layer in CPS.
The Perception layer in CPS is responsible for collecting data and information from the physical environment. It involves the processes of measurement, comparison, computation, and correction to ensure accurate and reliable data acquisition.
What is the primary objective of the Transmission layer in CPS?
The primary objective of the Transmission layer in CPS is to facilitate the efficient and secure transmission of data and information between different components of the system. It ensures that the collected data is transmitted reliably to the intended destinations.
Describe the key role of the Application layer in CPS.
The Application layer in CPS is focused on data and information analysis as well as decision-making processes. It involves interpreting the collected data to derive meaningful insights, accounting for system conditions, and making informed decisions to control and optimize the CPS.
Identify three threats specific to the Perception layer in CPS.
- Eavesdropping
- Passive Replay
- Port Scan
List three threats that pose risks to the Transmission layer in CPS.
- Man-in-the-Middle (MITM)
- Denial of Service (DOS)
- Repudiation
Name three threats associated with the Application layer in CPS.
- Botnets
- Malware
- Buffer Overflows
Explain the functions of Measurement, Comparison, Computation, and Correction in the Perception layer of CPS.
- Measurement involves acquiring data from the physical environment through sensors and other devices.
- Comparison evaluates the collected data against predefined criteria, identifying variations or anomalies.
- Computation processes and analyzes data to derive meaningful information and identify patterns.
- Correction involves adjusting system parameters based on the analysis of collected data, ensuring accurate and reliable operation.
Where do Programmable Logic Controllers (PLCs) typically reside in the Purdue model, and what is their primary function?
PLCs typically reside in the Control Zone of the Purdue model. Their primary function is to control and automate industrial processes by executing logic based on inputs from sensors and other devices.
Explain the role of a Remote Terminal Unit (RTU) in the Purdue model and its typical location.
RTUs are typically located in the Control Zone of the Purdue model. They serve the function of interfacing with sensors and actuators in the field, collecting data, and transmitting it to the central control system for further processing.
Describe the typical location and function of an Intelligent Electronic Device (IED) in the Purdue model.
IEDs are commonly found in the Control Zone of the Purdue model. They play a crucial role in monitoring and controlling specific aspects of industrial processes, often specializing in tasks such as protection, control, or monitoring.
Where is an Engineering Workstation (EWS) typically situated in the Purdue model, and what is its primary purpose?
EWSs are typically located in the Enterprise Zone of the Purdue model. They serve as workstations for engineers and operators, providing a platform for activities such as system configuration, monitoring, and analysis.
What is the usual location of a Human Machine Interface (HMI) in the Purdue model, and what role does it play in industrial control systems?
HMIs are typically situated in the Control Zone of the Purdue model. They serve as the interface between operators and the control system, providing a visual representation of the industrial processes and enabling operators to monitor and control the system.
Explain where a Data Historian is typically located in the Purdue model and its primary function.
Data Historians are typically located in the Enterprise Zone of the Purdue model. Their primary function is to archive and store historical data related to industrial processes, enabling analysis, reporting, and decision-making over extended periods.
Where is a Communication Gateway typically placed in the Purdue model, and what purpose does it serve?
Communication Gateways are typically located in the DMZ (Demilitarized Zone) of the Purdue model. They serve as intermediaries between different zones, facilitating secure communication between devices in the Control Zone and the Enterprise Zone.
What is the typical location of a Front End Processor in the Purdue model, and what role does it fulfill?
Front End Processors are typically located in the DMZ (Demilitarized Zone) of the Purdue model. They act as intermediaries, processing and managing data between devices in the Control Zone and external networks.
