Final answer:
Configuring VLANs primarily increases network security by segmenting a network into smaller groups and containing broadcast traffic, which also enhances network efficiency.
Step-by-step explanation:
Configuring Virtual Local Area Networks (VLANs) can provide several benefits to a network, one of which is increased network security. VLANs allow network administrators to segment a network into smaller, isolated groups, which can restrict unauthorized access and limit the spread of potential attacks within a network. Moreover, because broadcast traffic is contained within each VLAN, it can prevent unnecessary traffic from spreading across the entire network, thus enhancing overall network efficiency. However, configuring VLANs does not inherently provide higher data transfer speeds, enhance device compatibility, or improve power efficiency.