OPC UA modern architecture in SCADA systems - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is OPC UA in simple terms?

OPC UA is a way for machines and software to talk to each other safely and clearly, like a common language for industrial devices.

beginner

Name the two main layers in OPC UA architecture.

The two main layers are the Transport Layer (handles communication) and the Information Model Layer (organizes data and meaning).

intermediate

What role does the Information Model play in OPC UA?

It organizes data into a clear structure with types and relationships, so machines understand what the data means, not just the numbers.

intermediate

How does OPC UA ensure secure communication?

It uses encryption, authentication, and user permissions to keep data safe and only allow trusted devices to connect.

beginner

Why is OPC UA considered platform-independent?

Because it works on many types of devices and operating systems, making it flexible for different industrial setups.

What does the Transport Layer in OPC UA do?

A Defines the meaning of data

B Manages how data moves between devices

C Creates user interfaces

D Stores data permanently

The Transport Layer handles communication between devices.

Which feature helps OPC UA keep data secure?

A Simple text files

B Data compression

C Open access

D Encryption

Encryption protects data from being read by unauthorized users.

What is the purpose of the Information Model in OPC UA?

A To organize and describe data meaning

B To send emails

C To control machine speed

D To display graphics

The Information Model structures data so machines understand it.

Why is OPC UA called platform-independent?

A It requires special hardware

B It only works on Windows

C It works on many devices and systems

D It uses old technology

OPC UA runs on various devices and operating systems.

Which layer in OPC UA defines how data is structured?

A Information Model Layer

B Transport Layer

C Network Layer

D Application Layer

The Information Model Layer organizes data and its meaning.

Explain the main components of OPC UA modern architecture and their roles.

Think about how data moves, how it is understood, and how it is protected.

Describe how OPC UA ensures secure and reliable communication between industrial devices.

Focus on safety measures that protect data and connections.