What is a driver stack in the Windows OS?

Question

What is a driver stack in the Windows OS?

I was reading material in NDIS and wan't know what is it.

Answer 1

The Windows Driver Model (WDM) uses a layered approach in which a given device is served by at least two drivers: a bus driver and a function driver. A device might also have filter drivers that add value or modify the behavior of the device. The chain of drivers that serve a device is called a driver stack.

       

(From: http://www.microsoft.com/whdc/archive/wdmoverview.mspx)

Also see: Device Driver Introduction, specifically section 5 on the "Device Driver Stack."