The illustration shows how two clusters of database and storage servers can be isolated using VLAN IDs. The image shows four database servers at the top, a single switch in the middle, and seven storage servers at the bottom. Each server is numbered sequentially from left to right (DB servers 1-4, Storage Servers 1-7). There are two groups shown in the illustration, as indicated by a rectangular border with dashed lines.
The group on the left is titled VLAN ID 3888 and contains DB Server 1, DB Server 2, part of the switch, Storage Server 1, Storage Server 2, Storage Server 3, and Storage Server 4. There are lines connecting the DB servers to the switch, and connecting the switch to the storage servers.
The group on the right is titled VLAN ID 3889 and contains DB Server 3, DB Server 4, part of the switch, Storage Server 4, Storage Server 5, Storage Server 6, and Storage Server 7. There are lines connecting the DB servers to the switch, and connecting the switch to the storage servers.