Why modern trends reshape industrial automation in SCADA systems - Challenge Your Understanding

Challenge - 5 Problems

🧠 Conceptual

intermediate

Impact of IoT on Industrial Automation

How does the integration of Internet of Things (IoT) devices reshape industrial automation systems?

A IoT devices enable real-time data collection and remote monitoring, improving decision-making and efficiency.

B IoT devices replace all human operators, eliminating the need for maintenance teams.

C IoT devices increase manual data entry, slowing down automation processes.

D IoT devices disconnect machines from networks to enhance security.

💡 Hint

Think about how connected devices help machines talk to each other and to humans.

IoT devices collect data continuously and allow remote control, which helps optimize industrial processes and reduce downtime.

💻 Command Output

intermediate

SCADA System Command Output

What is the output of the following SCADA system command that queries sensor status?

SCADA systems

scada-cli sensor-status --id=101

A { "sensor_id": 101, "status": "active", "temperature": 75 }

B Error: sensor ID not found

C { "sensor_id": 101, "status": "inactive", "temperature": null }

D SyntaxError: invalid command format

💡 Hint

Assume sensor 101 is connected and working properly.

The command returns the sensor's current status and temperature reading in JSON format.

❓ Configuration

advanced

Configuring Secure Remote Access in SCADA

Which configuration snippet correctly enables secure remote access to a SCADA system using SSH with key authentication?

A

PermitRootLogin no
PasswordAuthentication yes
AllowUsers admin

B

PermitRootLogin yes
PasswordAuthentication no
AllowUsers guest

C

PermitRootLogin yes
PasswordAuthentication yes
AllowUsers admin

D

PermitRootLogin no
PasswordAuthentication no
AllowUsers admin
AuthorizedKeysFile /home/admin/.ssh/authorized_keys

💡 Hint

Secure access disables root login and password authentication, allowing only key-based login for admin.

Option D disables root login and password authentication, enabling key-based login for the admin user, which is a best practice for SCADA security.

❓ Troubleshoot

advanced

Diagnosing SCADA Network Latency Issues

A SCADA system shows delayed sensor data updates. Which is the most likely cause?

A SCADA server CPU running below 10% utilization.

B High network traffic causing packet loss and retransmissions.

C Sensors configured with too frequent data reporting intervals.

D Using wired Ethernet connections instead of wireless.

💡 Hint

Think about what causes delays in network communication.

High network traffic can cause packet loss and retransmissions, leading to delayed data updates in SCADA systems.

🔀 Workflow

expert

Automating SCADA System Backup Workflow

Which sequence correctly describes an automated backup workflow for SCADA configuration files?

A 2,1,3,4

B 1,3,2,4

C 1,2,3,4

D 3,1,2,4

💡 Hint

Consider the order to safely backup files without changes and verify afterward.

Stopping services first prevents file changes, then copying files ensures a consistent backup, restarting services resumes operation, and verifying confirms backup success.