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Exam AZ-305 topic 4 question 78 discussion

Actual exam question from Microsoft's AZ-305
Question #: 78
Topic #: 4
[All AZ-305 Questions]

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



You create peering between VNet1 and VNet2 and between VNet1 and VNet3.

The virtual machines host an HTTPS-based client/server application and are accessible only via the private IP address of each virtual machine.

You need to implement a load balancing solution for VM2 and VM3. The solution must ensure that if VM2 fails, requests will be routed automatically to VM3, and if VM3 fails, requests will be routed automatically to VM2.

What should you include in the solution?

  • A. Azure Firewall Premium
  • B. Azure Application Gateway v2
  • C. a cross-region load balancer
  • D. Azure Front Door Premium
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️

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zellck
Highly Voted 1 year, 9 months ago
Selected Answer: D
D is the answer. https://learn.microsoft.com/en-us/azure/frontdoor/front-door-faq#what-is-the-difference-between-azure-front-door-and-azure-application-gateway- While both Front Door and Application Gateway are layer 7 (HTTP/HTTPS) load balancers, the primary difference is that Front Door is a non-regional service whereas Application Gateway is a regional service. While Front Door can load balance between your different scale units/clusters/stamp units across regions, Application Gateway allows you to load balance between your VMs/containers etc. that is within the scale unit.
upvoted 18 times
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NotMeAnyWay
Highly Voted 1 year, 5 months ago
Selected Answer: D
D. Azure Front Door Premium Azure Front Door Premium now supports Private Link, which enables private connectivity from a virtual network to a service running in Azure. This feature can be used to connect to services across regions privately, so this should work for your use case where VM2 is in East US and VM3 is in West US. Here is how it could work: Azure Front Door Premium could be set up with Private Link to create a private endpoint in a regional network. This network can route traffic to VM2 and VM3 through the private link over the Microsoft backbone network, without exposure to the public internet. When one VM fails, Azure Front Door can automatically route the traffic to the other VM, maintaining the availability of your application.
upvoted 13 times
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SeMo0o0o0o
Most Recent 3 weeks ago
Selected Answer: D
D is correct
upvoted 1 times
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_punky_
1 month, 1 week ago
FrontDoor, Region LB7
upvoted 1 times
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heroofmightandmagic
6 months, 4 weeks ago
Maybe I'm missing something, but why can't Application Gateway be deployed in VNet1, alongside VM1? VM1 can talk to App Gateway and the backends of the App Gateway are not limited to be in same region, they can even reside outside of Azure. VNet1 is peered to both other VNets so Application Gateway should be able to reach the private IPs of VM2 and VM3.
upvoted 3 times
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Lazylinux
7 months, 2 weeks ago
Selected Answer: D
Given answer D is correct Azure Front Door Premium with Private Link configuration should meet the requirements
upvoted 2 times
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cris_exam
8 months ago
Global LB (cross region LB) could do this same load balancing just the same, but I think this is a slightly old question when cross region LB was still in preview, which is no longer the case. Still, AFD is capable as per below to have an internal LB as backend (Endpoints), so, let's say that AFD could very well be the answer here. https://learn.microsoft.com/en-us/azure/frontdoor/front-door-faq#can-i-deploy-azure-load-balancer-behind-front-door-
upvoted 2 times
ubdubdoo
7 months, 4 weeks ago
i dont think cross region LB supports private endpoints directly.
upvoted 1 times
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rex303
1 year, 8 months ago
Selected Answer: D
The answer is D. While both front door and the Cross-Region load balancer are used for cross-region load balancing. Front door allows the use of Private IP's, nd the Cross-region load balancer does not, as per documentation: https://learn.microsoft.com/en-us/azure/load-balancer/cross-region-overview#regional-redundancy . Also, as of the time of writing this answer, the Cross-Region load balancer is still in preview and should not be the first choice for production loads.
upvoted 7 times
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RandomNickname
1 year, 10 months ago
Selected Answer: D
Based on the limitation with C: as per below as well as in preview the more appropriate choice is likely D: https://learn.microsoft.com/en-us/azure/load-balancer/cross-region-overview#regional-redundancy
upvoted 1 times
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SajanK
1 year, 10 months ago
This link says that Azure Front Door premium can use private IPs. https://learn.microsoft.com/en-us/azure/frontdoor/private-link
upvoted 4 times
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OPT_001122
1 year, 10 months ago
Selected Answer: D
D. Azure Front Door Premium
upvoted 1 times
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upwork
1 year, 10 months ago
Can Azure Front Door load balance or route traffic within a virtual network? Azure Front Door Standard, Premium and (classic) tier requires a public IP or publicly resolvable DNS name to route traffic to backend resources. Azure resources such as Application Gateways or Azure Load Balancers can enable routing to resources within a virtual network. https://learn.microsoft.com/en-us/azure/frontdoor/front-door-faq#can-azure-front-door-load-balance-or-route-traffic-within-a-virtual-network-
upvoted 3 times
sumaju
1 year, 1 month ago
Azure Front Door Premium can connect to your origin using Private Link. Your origin can be hosted in a virtual network or hosted as a PaaS service such as Azure Web App or Azure Storage. Private Link removes the need for your origin to be accessed publicly. https://learn.microsoft.com/en-us/azure/frontdoor/private-link
upvoted 1 times
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upwork
1 year, 10 months ago
Front Door requires public IPs while the case explicitly says the VMs are accessible only on private IPs. Front Door: Backend pools can be composed of Storage, Web App, Kubernetes instances, or any other custom hostname that has public connectivity. Azure Front Door requires that the backends are defined either via a public IP or a publicly resolvable DNS hostname. Members of backend pools can be across zones, regions, or even outside of Azure as long as they have public connectivity.
upvoted 2 times
sumaju
1 year, 1 month ago
Azure Front Door Premium can connect to your origin using Private Link. Your origin can be hosted in a virtual network or hosted as a PaaS service such as Azure Web App or Azure Storage. Private Link removes the need for your origin to be accessed publicly. https://learn.microsoft.com/en-us/azure/frontdoor/private-link
upvoted 1 times
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mscbgslt
1 year, 10 months ago
Selected Answer: D
https://learn.microsoft.com/en-us/azure/frontdoor/front-door-faq
upvoted 1 times
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janvandermerwer
1 year, 10 months ago
Selected Answer: D
D - Looks to be the best answer https://learn.microsoft.com/en-us/azure/frontdoor/health-probes b - Application load balancer is only for in-region connectivity. - incorrect
upvoted 3 times
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jwjwjw
1 year, 10 months ago
Selected Answer: D
VMs are in different regions so only FrontDoor
upvoted 3 times
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[Removed]
1 year, 10 months ago
Selected Answer: B
Answer is B as per - https://learn.microsoft.com/en-us/azure/application-gateway/overview-v2 "The autoscaling v2 SKU now supports default health probes to automatically monitor the health of all resources in its backend pool and highlight those backend members that are considered unhealthy. "
upvoted 3 times
[Removed]
1 year, 10 months ago
Answer might be correct looking at this
upvoted 1 times
[Removed]
1 year, 10 months ago
https://learn.microsoft.com/en-us/azure/frontdoor/health-probes
upvoted 1 times
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