A Virtual Local Area Network (VLAN) is a network construct that makes it possible to create broadcast domains at the OSI Model layer-2 level. IBM Cloud uses VLANs to isolate broadcast traffic, to provide packet identification, and to let multiple workloads coexist on the same physical equipment. Depending on your situation, you may never need to interact with VLANs directly, because they are managed automatically. Optionally, you can order additional VLANs based on your unique network isolation requirements.