The hv_netvsc driver implements the virtual network device for FreeBSD guest partitions running on Hyper-
V. FreeBSD guest partitions running on Hyper-V do not have direct access to network devices attached to
the Hyper-V server. Although a FreeBSD guest can access network devices using Hyper-V's full emulation
mode, the performance in this mode tends to be unsatisfactory.
To counter the above issues, the hv_netvsc driver implements a network Virtual Service Consumer (VSC)
that relays network requests from the guest partition to the network Virtual Service Provider (VSP)
hosted in the root partition using the high performance data exchange infrastructure provided by
hv_vmbus(4) driver. The VSP in the root partition then forwards the network related requests to the
physical network card.