What are Logical Layers?

What are Logical Layers?

• A. The underlying physical hardware
• B. Apps, their end user interfaces with different kinds of clients, and engagements/interactions users have with them, relying on underlying infrastructure
• C. Data centers
• D. Network protocols

Answer: (B)

Logical Layers refer to the parts of a software system that users directly interact with and the ways the app is delivered to them, independent of the hardware that runs it. This concept focuses on the apps themselves, their end-user interfaces across different clients, and the engagements or interactions users have with those apps. All of these sit on top of the underlying infrastructure that makes them possible, such as servers and storage, but the layers themselves are about the software and user experience, not the physical components. That’s why describing it as apps, their user interfaces across various clients (web, mobile, API), and the interactions users have with them fits best. The other options point to physical things or protocols—physical hardware, data centers, or network protocols—which are part of the infrastructure or transport, not the user-facing, software-facing layers being described.

Logical Layers refer to the parts of a software system that users directly interact with and the ways the app is delivered to them, independent of the hardware that runs it. This concept focuses on the apps themselves, their end-user interfaces across different clients, and the engagements or interactions users have with those apps. All of these sit on top of the underlying infrastructure that makes them possible, such as servers and storage, but the layers themselves are about the software and user experience, not the physical components.

That’s why describing it as apps, their user interfaces across various clients (web, mobile, API), and the interactions users have with them fits best. The other options point to physical things or protocols—physical hardware, data centers, or network protocols—which are part of the infrastructure or transport, not the user-facing, software-facing layers being described.