Cisco Certified Network Associate (CCNA) Practice Exam

What is one advantage of using VLANs?

1. They allow broadcast traffic to be limited to specific segments of a network.

2. They completely eliminate the need for routing in a network.

3. They automatically balance the load of traffic across multiple switches.

4. They require no configuration to segment the network effectively.

The correct answer is: They allow broadcast traffic to be limited to specific segments of a network.

Using VLANs allows broadcast traffic to be limited to specific segments of a network, which is one of their key advantages. By grouping devices into virtual LANs, broadcast messages are confined within those VLANs, reducing unnecessary network traffic and improving overall performance. This segmentation enhances security and efficiency because it isolates broadcast domains, minimizing the impact of broadcast traffic on the entire network. The other choices do not accurately represent the functions or benefits of VLANs. For instance, routing is still necessary to facilitate communication between different VLANs, so stating that VLANs eliminate the need for routing is misleading. Additionally, VLANs do not automatically balance traffic across switches; network load balancing typically requires additional protocols and configurations. Lastly, while VLANs simplify network segmentation, they do require configuration to effectively implement and manage the different virtual networks.