Discrete Device Assignment (DDA) Configuration and Requirements

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Last updated 6:24 AM on 10/9/26
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30 Terms

1
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Which Hyper-V feature gives VMs direct access to physical PCIe hardware?
Discrete Device Assignment (DDA)
2
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Which Windows Server version introduced DDA?
Windows Server 2016
3
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What hardware interface does DDA use for device passthrough?
PCI Express (PCIe)
4
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What virtualization layer does DDA allow VMs to bypass?
Hyper-V hypervisor layer
5
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Which graphics hardware is officially supported for DDA?
PCIe GPUs
6
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Which storage hardware is officially supported for DDA?
NVMe storage devices
7
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Which Windows desktop OS supports DDA as a guest?
Windows 10
8
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Which older server OS requires specific updates for DDA support?
Windows Server 2012 R2
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What PCIe feature must the root complex support for DDA?
Access Control Services (ACS)
10
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What hardware component manages device memory access for DDA?
IOMMU
11
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What type of PCIe control must the host support for DDA?
Native PCI Express control
12
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What Microsoft script checks whether a host supports DDA?
PowerShell machine profile script
13
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What device information does the machine profile script identify?
PCIe location path
14
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Where should drivers for an assigned device be installed?
Guest VM only
15
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Which VM memory feature is unavailable when using DDA?
Dynamic memory
16
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Which VM mobility feature is unavailable when using DDA?
Live migration
17
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Which VM state feature is unavailable when using DDA?
Save and restore
18
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Which clustering feature is unavailable for DDA VMs?
High availability clustering
19
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What can happen if a compromised DDA VM causes a PCIe bus error?
Physical host server crash
20
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What can happen if a DDA device is dismounted improperly?
Host server crash
21
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What manufacturer-provided driver helps prevent unsafe dismounts?
Device mitigation driver
22
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Which tool is used to configure DDA?
PowerShell
23
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What automatic stop action should be configured for a DDA VM?
Turn off the VM
24
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What is the default automatic stop action changed from for DDA?
Save state
25
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What must be done to a PCIe device on the host before dismounting?
Disable the device
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What parameter is needed to dismount without a mitigation driver?
-Force
27
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What identifies the physical device when assigning it to a VM?
PCIe location path
28
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What CPU memory feature might a GPU require for DDA?
Write combining
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What memory-mapped I/O settings might a DDA GPU require?
32-bit and greater-than-32-bit MMIO space
30
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Where is a returned DDA device re-enabled after mounting it to the host?
Host Device Manager