Virtual local area networks (VLANs) enable you to divide your network into subnetworks without having to add resources to the physical network environment. Therefore, the subnetworks are virtual and you use the same physical network resources. VLANs provide applications with isolated subnetworks so that only the applications in the same VLAN can communicate with each other. You can configure multiple virtual networks within a single network unit, for example, a switch by combining VLANs and Oracle Solaris zones. For more information about VLANs and procedures to configure and administer VLANs, see Chapter 3, Configuring Virtual Networks by Using Virtual Local Area Networks.