What setting ensures that virtual networks on a virtual switch are isolated from each other?

The VLAN ID is a crucial setting that ensures isolation of virtual networks on a virtual switch. VLAN, or Virtual Local Area Network, works by tagging each network frame with a specific identifier, allowing multiple networks to coexist on the same physical switch infrastructure without interfering with each other. By using different VLAN IDs, you can segment traffic based on the assigned identifiers, thus creating separate broadcast domains within the same physical environment.

This capability of VLANs enhances security and manages bandwidth use efficiently by ensuring that only devices assigned the same VLAN ID can communicate directly with each other, while traffic between different VLANs is restricted unless routing policies are implemented to facilitate communication. This mechanism is fundamental in virtualized environments where numerous virtual machines might need to operate independently and securely on shared resources.