Understanding SCADA Architecture

What does SCADA stand for?

• System Control and Data Analysis

• Supervisory Command and Data Application

• Supervisory Control and Data Acquisition

• Secure Control and Data Access

Name the main components of a SCADA system.

• Human-Machine Interface (HMI), Supervisory System, Remote Terminal Units (RTUs), Programmable Logic Controllers (PLCs), Communication Infrastructure, Data Historian

• Control Panel Interface

• Data Acquisition System

• Field Sensors

What is the role of the Human-Machine Interface (HMI) in SCADA?

• The HMI is responsible for network security in SCADA systems.

• The HMI is used solely for data storage in SCADA systems.

• The HMI generates automated reports without operator input.

• The HMI allows operators to interact with and control the SCADA system.

Describe the function of the SCADA Master Station.

• The SCADA Master Station generates power for remote devices.

• The SCADA Master Station collects, processes, and displays data from remote devices for monitoring and control.

• The SCADA Master Station is responsible for hardware maintenance only.

• The SCADA Master Station only stores data without processing it.

What is the purpose of Remote Terminal Units (RTUs) in SCADA?

• To store historical data for analysis

• The purpose of RTUs in SCADA is to collect data from field devices and transmit it to the central system for monitoring and control.

• To provide power to the SCADA system

• To replace human operators in the field

Explain the difference between SCADA and DCS (Distributed Control Systems).

• SCADA is for large-scale monitoring and control, while DCS is for localized process control.

• SCADA and DCS are the same systems with no differences.

• DCS is primarily for remote monitoring.

• SCADA is only used for data logging.

What communication protocols are commonly used in SCADA systems?

• FTP

• HTTP

• Modbus, DNP3, OPC, IEC 61850

• SMTP

How does data acquisition work in a SCADA system?

• Data acquisition in a SCADA system involves collecting data from field devices, processing it through RTUs or PLCs, and transmitting it to the SCADA master station for monitoring.

• Data acquisition in a SCADA system only involves manual data entry.

• SCADA systems do not process data; they only display it.

• Data is collected solely through user input without any field devices.

What are the security challenges associated with SCADA systems?

• SCADA systems always use the latest software

• SCADA systems are vulnerable to cyber attacks, lack encryption, have outdated software, insufficient access controls, and face physical security risks.

• SCADA systems are immune to cyber threats

• SCADA systems have robust physical security measures

Why is redundancy important in SCADA architecture?

• Redundancy complicates the SCADA architecture unnecessarily.

• Redundancy is only necessary for small systems.

• Redundancy increases costs without benefits.

• Redundancy is important in SCADA architecture to ensure reliability and minimize downtime.