CCNA: Cisco Certified Network Associate — Question 1024

What is a characteristic of a Layer 2 switch?

Answer options

• A. transfers all frames received to every connected device
• B. offers one collision domain for all connected devices
• C. transmits exclusively at half duplex
• D. supports segmentation using tagging protocols

Correct answer: D

Explanation

The correct answer is D, as Layer 2 switches use tagging protocols such as VLANs to segment network traffic, improving efficiency and security. Option A is incorrect because Layer 2 switches intelligently forward frames only to the intended recipient devices. Option B is wrong because Layer 2 switches create separate collision domains for each connected device. Option C is not accurate as Layer 2 switches can operate in full duplex mode, allowing simultaneous send and receive.