Editing 100BaseVG (section)

=== Demand Priority ===
Certain workloads demand their data be delivered at particular times - video and audio are good examples. On lightly used networks this traffic can be sent as normal data, but on busy networks, retransmission delays can push delivery outside the [[jitter]] limits of the data.

VG introduced the concept of Demand Priority to address this problem. When a node requests the ability to send data, it indicates this has high or normal priority. High-priority data is given transmission permission as soon as possible, typically as soon as any current data packet is completed. By letting the hub manage access, the architecture can guarantee required bandwidth and requested service priority to particular applications or nodes. It also can guarantee that the network can be scaled up (enlarged) without loss of bandwidth.