Your network contains two Hyper-V hosts that run Windows Server 2012 R2. The Hyper-V
hosts contains several virtual machines that run Windows Server 2012 R2.
You install the Network Load Balancing feature on the virtual machines.
You need to configure the virtual machines to support Network Load Balancing (NLB).
Which virtual machine settings should you configure?
A.
DHCP guard
B.
Port mirroring
C.
Router guard
D.
MAC address
Explanation:
http://social.technet.microsoft.com/Forums/windowsserver/en-US/5b3a0a9d-26a2-49babbbe- 29d11fcbb7ce/nlb-on-hyperv?forum=winserverhyperv
For NLB to be configured you need to enable MAC address spoofing.
it may be D
Reference: http://blogs.msdn.com/b/clustering/archive/2010/07/01/10033544.aspx
In Hyper-V, the VM host prevents dynamic MAC address updates as an extra layer of security in the datacenter. This is because the VM may have full administrator rights, yet it may be untrusted in the datacenter, for example when the VM hosting is provided by an independent hosting company. In this scenario, we need to make sure that one VM cannot cause a DOS or information disclosure attack against another VM. If a VM is able to spoof its MAC address, then it can spoof the MAC addresses of other VMs and impact other VMs on that host. The physical switches have similar protections and it is up to the admin to enable that protection or not.
If you do not enable spoofing of MAC address prior to configuring NLB on the VM you could potentially have problems with the NLB cluster.
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Agree it’s D
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