Hyper-V

Question 1

What are the system requirements for Hyper-V?

Answer 1

SLAT-capable 64-bit processor
VM Monitor Mode Extensions
Hardware Assisted Virtualisation
Hardware-enforced DEP

Question 2

How do Gen 1 and Gen 2 VMs differ?

Answer 2

Gen 1
Emulation based drivers
32/64bit
Gen 2
Software based drivers
Boot from vhdx
64bit

Question 3

What is the linux command to verify the installation of LIS?

Answer 3

/sbin/modinfo hv_vmbus

Question 4

What is memory buffer?

Answer 4

How much additional RAM is reserved additional compared to current utilisation percentage

Question 5

What is memory weight?

Answer 5

Memory prioritisation between VMs

Question 6

What is NUMA Spanning?

Answer 6

Non Uniform Memory Access
Machines with multiple CPUs, allows VMs to access memory from another CPU
Can configure virtual NUMA per VM to replicate host machine topology

Question 7

What is the PS command to enable resource metering?

Answer 7

Enable-VMResourceMetering

collection interval: Set-VMHost -ResourceMeteringInterval

Question 8

What is the PS command to view resource metering statistics?

Answer 8

Measure-VM

Question 9

What are the requirements to hot add memory?

Answer 9

Static memory, Windows 10 or Server 2016 latest linux distro

Gen 1 or Gen 2

Question 10

When importing virtual machines how do restore, register in-place and copy differ?

Answer 10

Register In-Place: Use existing UUID and file
Restore: Use UUID copying original file to new location
Copy: Create new UUID

Question 11

How do you pass through devices from the host into the VM?

Answer 11

Direct Device Assignment *ensure devices is diabled in device manager
Get-Command device -Module Hyper-V

Question 12

What is the PS command to update the version of a VM?

Answer 12

Update-VMVersion

Question 13

How does VHD set work?

Answer 13

VHDS connects to VMs
AVHDX contains data changes
*for clustering

Question 14

What is the advantage of VHD set compared to shared VHDX?

Answer 14

Online resizing
Host level backup
Hyper-V replica support

Question 15

What are the limitations of using VHD set

Answer 15

No:
Live migration
Checkpoints

Question 16

What are requirement for Hyper-V fibre channel SAN?

Answer 16

NPIV capable NIC
NPIV capable HBA (host bus adapter)
HBAs have World Wide Names for identificatin

Question 17

What is SR-IOV?

Answer 17

Virtualises physical NICs to deliver packets directly bypassing hypervisor for improved performance

Question 18

What is VMQ?

Answer 18

Stores incoming packets on NIC to bypass vSwitches

Question 19

What is IPsec task offloading?

Answer 19

Offloads mathematically intensive IPsec functions to the CPU

Question 20

In NIC teaming what does dynamic switch dependant mode use?

Answer 20

LACP

Question 21

What are the different load balancing modes?

Answer 21

Address Hash: Uses IP and MAC to determine which NIC to send traffic
Hyper-V: Ties VM to specific NIC in team
Dynamic: Uses Address hash for outbound, Hyper-V for inbound

Question 22

What is SET (Switch Embedded Teaming)?

Answer 22

Teaming built into hyper-v host
New-VMSwitch
*NICs must be same make, model, driver

Question 23

What is RDMA?

Answer 23

Remote Direct Memory Access capable NIC
Allows data transfer directly to and from application memory bypassing data buffers in host operating system
Enable-NetAdapterRdma