Nokia Certified Network Associate (NCNA) — Question 33

Which of the following is a feature of Layer 3?

Answer options

• A. Provides an universal addressing scheme
• B. Ensures data is delivered across the Layer 2 network.
• C. Provides reliable data transfers.
• D. Provides a physical interface to the network.

Correct answer: A

Explanation

The correct answer is A because Layer 3, also known as the Network layer, is responsible for logical addressing and routing. Options B, C, and D relate to Layer 2 and physical characteristics, which are not features of Layer 3.