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Exam AWS Certified Solutions Architect - Professional topic 1 question 803 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional
Question #: 803
Topic #: 1
[All AWS Certified Solutions Architect - Professional Questions]

A company's solutions architect is analyzing costs of a multi-application environment. The environment is deployed across multiple Availability Zones in a single
AWS Region. After a recent acquisition, the company manages two organizations in AWS Organizations. The company has created multiple service provider applications as AWS PrivateLink-powered VPC endpoint services in one organization. The company has created multiple service consumer applications in the other organization.
Data transfer charges are much higher than the company expected, and the solutions architect needs to reduce the costs. The solutions architect must recommend guidelines for developers to follow when they deploy services. These guidelines must minimize data transfer charges for the whole environment.
Which guidelines meet these requirements? (Choose two.)

  • A. Use AWS Resource Access Manager to share the subnets that host the service provider applications with other accounts in the organization.
  • B. Place the service provider applications and the service consumer applications in AWS accounts in the same organization.
  • C. Turn off cross-zone load balancing for the Network Load Balancer in all service provider application deployments.
  • D. Ensure that service consumer compute resources use the Availability Zone-specific endpoint service by using the endpoint's local DNS name.
  • E. Create a Savings Plan that provides adequate coverage for the organization's planned inter-Availability Zone data transfer usage.
Show Suggested Answer Hide Answer
Suggested Answer: AB 🗳️
by Buggie at Jan. 8, 2022, 12:30 a.m.
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saeidp
Highly Voted 2 years, 10 months ago
CD A is wrong: Because RAM cannot use sharing between organizations then this answer is out
upvoted 10 times
firstabed
2 years, 2 months ago
RAM correct AWS Resource Access Manager (AWS RAM) helps you securely share the AWS resources that you create in one AWS account with other AWS accounts. If you have multiple AWS accounts, you can create a resource once and use AWS RAM to make that resource usable by those other accounts. If your account is managed by AWS Organizations, then you can share resources with all the other accounts in the organization, or only those accounts contained by one or more specified organizational units (OUs) https://docs.aws.amazon.com/ram/latest/userguide/what-is.html
upvoted 2 times
Byrney
2 years ago
Sharing doesn't save the inter-AZ data costs - these would occur even if all the resources were in the same account.
upvoted 1 times
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gunjan229
Highly Voted 2 years, 8 months ago
Should be A and B for below reasons: 1. If the accounts are within same organization then only resources can be shared. 2. Data transfer charges will be less within same AZ, so if we use shared subnet then resources will be launched in same AZ 3. C is wrong because NLB cross zone balancing will incur transfer charges.
upvoted 5 times
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VerRi
Most Recent 8 months, 1 week ago
Selected Answer: BD
"The company manages two organisations in AWS Organizations," which means they have one organisation for service providers and one more for consumers. A. Since applications are created in the provider organisation, sharing the subnet with other accounts within the same organisation has no effect. B. Combining provider and consumer into one organisation is the first move for Option D. C. Cross-zone load balancing does not change the amount of data traffic passing through the NLB, it affects how that traffic is distributed across the targets. D. AZ-specific endpoint helps to reduce data transfer charges because it keeps the traffic in a single AZ and is designed for intra-regional communication within the same account or organization. E. WTF
upvoted 1 times
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ggrodskiy
1 year, 4 months ago
Correct CD.
upvoted 1 times
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Jesuisleon
1 year, 6 months ago
Selected Answer: AB
A,B are related with the question. for NLB the question even not mentioned it.
upvoted 1 times
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pixepe
2 years ago
C D Q: Am I charged for regional AWS data-transfer when I enable cross-zone load balancing in Network Load Balancer? A: Yes, you will be charged for regional data transfer between Availability Zones with Network Load Balancer when cross-zone load balancing is enabled. Check the charges in the data transfer section of the Amazon EC2 On-Demand Pricing page. From AWS FAQ
upvoted 1 times
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Byrney
2 years ago
The costs are from inter-AZ data transfer. Only C and D address that.
upvoted 1 times
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[Removed]
2 years, 1 month ago
Selected Answer: CD
Aim is to avoid inter-AZ charges: C - No cross-zone load balancing will save cost. Question doesn't mention reliability D - You can use AZ specific endpoint DNS e.g. vpce-xxxx-xxxx-us-east-1b.vpce-svc-xxx.us-east-1.vpce.amazonaws.com
upvoted 3 times
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dcdcdc3
2 years, 2 months ago
Selected Answer: CD
C - cross-zone NLD adds cost D is worded very bad as there is no "local" DNS but there is private IP of each PrivateLink endpoint, auto-created by AWS, so apps can be set to use that private IP (there is more to it but for the exam that should suffice): https://aws.amazon.com/blogs/apn/reviewing-dns-mechanisms-for-routing-traffic-and-enabling-failover-for-aws-privatelink-deployments/ A and B are not wrong, but not contributing to saving Data transfer charges E - not aware of Savings plan for Data transfers, would be nice if it existed
upvoted 2 times
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Yashar1691
2 years, 2 months ago
Selected Answer: AB
gunjan229's explanation sounds good.
upvoted 2 times
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Ni_yot
2 years, 3 months ago
C has to be one of the ans surely. If you enable cross-zone load balancing, you no longer have to worry that clients caching DNS information will result in requests being distributed unevenly. With this launch, requests are distributed equally to your targets regardless of the Availability Zone in which they are located. This feature makes it easier for you to deploy and manage your applications across multiple Availability Zones. When you enable cross-zone load balancing for your Network Load Balancer, regional data charges apply.
upvoted 1 times
Ni_yot
2 years, 3 months ago
A will be my other ans. AWS Resource Access Manager (RAM) helps you securely share your resources across AWS accounts, within your organization or organizational units (OUs) in AWS Organizations, and with IAM roles and IAM users for supported resource types. You can use AWS RAM to share transit gateways, subnets, AWS License Manager license configurations, Amazon Route 53 Resolver rules, and more resource types.
upvoted 1 times
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Kyperos
2 years, 3 months ago
I dont know exactly answer but cross-zone ELB not extra charge so option C dont affect to data transmission cost!
upvoted 1 times
sb333
2 years, 2 months ago
Q: Am I charged for regional AWS data-transfer when I enable cross-zone load balancing in Network Load Balancer? A: Yes, you will be charged for regional data transfer between Availability Zones with Network Load Balancer when cross-zone load balancing is enabled. Check the charges in the data transfer section of the Amazon EC2 On-Demand Pricing page.
upvoted 1 times
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kenchou73
2 years, 3 months ago
Selected Answer: CD
Vote for C D, guideline for developers should be reducing the traffic between AZ
upvoted 1 times
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asfsdfsdf
2 years, 4 months ago
Selected Answer: AB
C - will not provide any savings the traffic will still be split into different AZs that will cost inter-az charges E - Saving plans are not for inter-az charges D - Will not improve the charges as the consumer cant control which AZ will be used on the provider end. So only A and B are valid - RAM can share Subnets only in the same org, so move accounts to the same org and share the needed subnet work directly without inter-az charges.
upvoted 2 times
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aandc
2 years, 5 months ago
Vote for AC
upvoted 1 times
aandc
2 years, 5 months ago
Change to AB
upvoted 1 times
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bobsmith2000
2 years, 6 months ago
Selected Answer: AB
A) Use RAM to share subnets and B) Deploy everything into the same org
upvoted 1 times
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aws01
2 years, 10 months ago
Selected Answer: AC
seems like A and C
upvoted 1 times
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