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Exam AZ-700 topic 3 question 51 discussion

Actual exam question from Microsoft's AZ-700

Question #: 51
Topic #: 3

HOTSPOT -

You have an Azure subscription that contains the virtual networks shown in the following table.

The subscription contains the virtual machines shown in the following table.

You create a load balancer named LB1 that has the following configurations:

• SKU: Basic
• Type: Internal
• Subnet: Subnet12
• Virtual network: VNet1

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

NOTE: Each correct selection is worth one point.

Show Suggested Answer

Suggested Answer:

by Acaer at Sept. 8, 2023, 9:49 p.m.

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Lazylinux

Highly Voted 1 year, 9 months ago

Definitely YNN Basic LB needs vms to be in Avail set or VM scale set and in same vnet where LB is deployed but STD LB can load balance single VMs by adding single vms to backend pool but they also MUST be n same vNET where the LB is deployed

upvoted 17 times

manhattan

5 months, 1 week ago

yes, YNN https://learn.microsoft.com/en-us/azure/load-balancer/skus#skus

upvoted 1 times

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dblacksmith

Most Recent 4 months, 1 week ago

Lb is attached to subnet 12 it can only load balance for the subnet NNN

upvoted 1 times

xRiot007

2 months, 2 weeks ago

Wrong. The LB working context is the virtual network, not the subnet. First answer is a Yes.

upvoted 1 times

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bewavos102

7 months ago

I think the suggested answer is correct: - VM1 and VM2 (in the same VNet and subnet): Yes, Basic Load Balancer can balance traffic between them. - VM2 and VM3 (in the same VNet but different subnets): Yes, Basic Load Balancer can balance traffic between them. The availability set only affects high availability and fault tolerance for VMs within the same VNet. It doesn't affect the ability of the Basic Load Balancer to balance traffic between VMs in different subnets within the same VNet. - VM3 and VM4 (in different VNets): No, Basic Load Balancer cannot balance traffic across VNets, even if they are peered. If the second is wrong, just explain clearly why because previous comments are a mess.

upvoted 1 times

bewavos102

7 months ago

I correct myself: is YNN. The second is No because is a Basic SKU load balancer, and it only support backend pool members in the same virtual network and availability set/scale set.

upvoted 1 times

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fodocel235

1 year, 3 months ago

N, N, N according the documentation: A load balancer rule can't span two virtual networks. All load balancer frontends and their backend instances must be in a single virtual network. https://learn.microsoft.com/en-us/azure/load-balancer/components#limitations

upvoted 3 times

fodocel235

1 year, 3 months ago

Please remove the above comment. I was unaware that Subnet 11 and subnet 12 where in the same Vnet.

upvoted 5 times

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Murad01

1 year, 6 months ago

I think the correct answer is YNN, VM3 and VM4 are not in the same Vnet and Scale set

upvoted 4 times

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glatovi

1 year, 9 months ago

I think it's NNN. ILB is on subnet12 and not subnet11

upvoted 3 times

Lazylinux

1 year, 5 months ago

Sorry you are INCORRECT - Definitely YNN - you can try do the following as i had done, i created vnet01 (any region u like), then i created subnet1 and subnet2 in vnet01 then i created internal LB01 in subnet1 and VM01 (scale set) in subnet2, then i was able to add VM01 to backendpool of LB01 and from another vm i was able to access VM01 port 80 and via LB01 hence yes you can add vm from different subnet, BUT thing to remember is that VM MUST be in the same VNET and region as the load balancer, this is the ONLY restriction to backendpool

upvoted 3 times

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goooru

1 year, 9 months ago

@glatovi you right

upvoted 1 times

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Acaer

1 year, 9 months ago

YNN Basic Load Balancer Backend pool Virtual machines in a single availability set or virtual machine scale set https://learn.microsoft.com/en-us/azure/load-balancer/skus 1. Y VM1 and VM2 are in the same availability set 2. N VM3 is not in AS1 3. N VM3 and 4 are not in an availability or scale set

upvoted 4 times

Acaer

1 year, 9 months ago

Basic Load Balancer can balance requests between Subnets but not VNets. It can only be used for exactly 1 VM(not a good idea), 1 Availability Set or 1 Scale Set When you create a Basic LB with frontend IP in Subnet2 you can pick the AS1 VM's from Subnet1 This makes answer 1 YES In Portal: When you choose 1 single VM or 1 AS VM or 1 Scale Set VM, all other VM's which are not part of the Set wont be pickable anymore. So when you pick VM1 for the pool, only VM2 will be left to be picked for the pool. If you pick VM3 for the pool, no other VM will be available to be used. This makes answer 2 NO Like i have said in the beginning, you cant balance between VNet's and also the VM's are not in any AS anyways. This makes answer 3 NO

upvoted 7 times

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