What is a key benefit of using VLANs in Ethernet networks?

Using VLANs (Virtual Local Area Networks) in Ethernet networks primarily improves performance and security through network segmentation. By dividing a single physical network into multiple logical networks, VLANs allow administrators to isolate different types of traffic. This segmentation means that devices within the same VLAN can communicate directly with each other without interference from traffic on other VLANs, which enhances overall network performance by reducing congestion.

Additionally, VLANs also contribute to security by limiting access between different segments of the network. For instance, sensitive data can be kept in a separate VLAN, ensuring that only authorized users can access it. This strategy helps mitigate risks from potential attacks or unauthorized access, as the segmentation effectively creates barriers between different groups and functions within an organization.

In summary, the use of VLANs facilitates a more organized, efficient, and secure networking environment, making it a vital practice in modern networking strategies.