CCNA: Cisco Certified Network Associate — Question 1032

What is a characteristic of a Layer 2 switch?

Answer options

• A. provides a single broadcast domain for all connected devices
• B. tracks the number of active TCP connections
• C. offers one collision domain for all connected devices
• D. makes forwarding decisions based on MAC addresses

Correct answer: D

Explanation

The correct answer is D because Layer 2 switches make decisions on how to forward frames based on MAC addresses. Option A is incorrect as it describes a broadcast domain characteristic, while option B refers to TCP connections, which is not relevant to Layer 2 functionality. Option C is misleading because Layer 2 switches can create multiple collision domains, not just one.