NDIS (Network Device Interface Specification) is a standard that allows for multiple network adapters and multiple protocols to coexist. NDIS permits the high-level protocol components to be independent of the network interface card by providing a standard interface. Windows NT supports NDIS 3.0.
The network adapter card driver is at the very bottom of the Windows NT network architecture. Because Windows NT supports NDIS 3.0, it requires network adapter card drivers written to the NDIS 3.0 specification. NDIS 3.0 allows an unlimited number of network adapter cards in a computer and an unlimited number of protocols that can be bound to a single adapter card.
NDIS 3.0 is based on NDIS 2.0, which was the standard used by OS/2 NDIS device drivers. NDIS 3.0 conforms to the device driver standards established for Windows NT: