NDIS 6.1 added the following interfaces to NDIS 6.0:
For more information about NDIS 6.1, see Introduction to NDIS 6.1.
NDIS 6.1 also includes updates to support MSI-X dynamic configuration for receive side scaling (RSS). For more information about NDIS 6.1 changes in RSS, see NDIS MSI-X. RSS is updated in NDIS 6.20 to provide support for more than 64 processors.
The direct OID request interface is optional for NDIS 6.1 drivers but it is mandatory for NDIS 6.20 miniport drivers.
NetDMA 1.1 and 2.0 were introduced with NDIS 6.1. NetDMA 2.1 is introduced with NDIS 6.20 to provide support for more than 64 processors.