What is one of the main benefits of using a VLAN?

One of the primary benefits of using a VLAN (Virtual Local Area Network) is enhanced network security and performance. VLANs allow network administrators to segment a network into different logical groups, regardless of the actual physical layout of the devices. By doing so, sensitive data can be isolated within specific VLANs, limiting access to authorized users only. This segmentation reduces the risk of data breaches and unauthorized access, thereby improving overall security.

Additionally, VLANs can improve network performance by reducing broadcast traffic. By grouping devices that communicate frequently, VLANs minimize unnecessary data packets that might otherwise clog the network. This leads to a more efficient use of bandwidth, which can improve the speed and reliability of the network for all users.

The other choices do not adequately represent the primary advantages that VLANs offer. While improved compatibility could be a consideration, VLANs primarily focus on security and efficiency. Increased physical cabling requirements would run counter to the purpose of using VLANs, which aim to reduce clutter by allowing logical, rather than physical, segmentation. Lastly, while VLANs can aid in management, they do not unify all devices into one network, but rather categorize them into separate logical segments for better control and organization.