CCNA: Cisco Certified Network Associate — Question 575

What is a function of Layer 3 switches?

Answer options

• A. They route traffic between devices in different VLANs.
• B. They transmit broadcast traffic when operating in Layer 3 mode exclusively.
• C. They move frames between endpoints limited to IP addresses.
• D. They forward Ethernet frames between VLANs using only MAC addresses,

Correct answer: A

Explanation

Layer 3 switches are designed to route traffic between different VLANs, allowing for inter-VLAN communication. The other options are incorrect; for example, option B is misleading as Layer 3 mode does not exclusively transmit broadcasts, and options C and D describe Layer 2 behavior rather than Layer 3 functionalities.