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Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 35 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01
Question #: 35
Topic #: 1
[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

A company's development team has created a new product recommendation web service. The web service is hosted in a VPC with a CIDR block of 192.168.224.0/19. The company has deployed the web service on Amazon EC2 instances and has configured an Auto Scaling group as the target of a Network Load Balancer (NLB).
The company wants to perform testing to determine whether users who receive product recommendations spend more money than users who do not receive product recommendations. The company has a big sales event in 5 days and needs to integrate its existing production environment with the recommendation engine by then. The existing production environment is hosted in a VPC with a CIDR block of 192.168.128 0/17.
A network engineer must integrate the systems by designing a solution that results in the least possible disruption to the existing environments.
Which solution will meet these requirements?

  • A. Create a VPC peering connection between the web service VPC and the existing production VPC. Add a routing rule to the appropriate route table to allow data to flow to 192.168.224.0/19 from the existing production environment and to flow to 192.168.128.0/17 from the web service environment. Configure the relevant security groups and ACLs to allow the systems to communicate.
  • B. Ask the development team of the web service to redeploy the web service into the production VPC and integrate the systems there.
  • C. Create a VPC endpoint service. Associate the VPC endpoint service with the NLB for the web service. Create an interface VPC endpoint for the web service in the existing production VPC.
  • D. Create a transit gateway in the existing production environment. Create attachments to the production VPC and the web service VPC. Configure appropriate routing rules in the transit gateway and VPC route tables for 192.168.224.0/19 and 192.168.128.0/17. Configure the relevant security groups and ACLs to allow the systems to communicate.
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Suggested Answer: C 🗳️
by zaazanuna at March 18, 2023, 10:31 p.m.
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study_aws1
Highly Voted 1 year, 5 months ago
The CIDR ranges are overlapping, hence VPC peering or Transit Gateway will not work in this scenario. It is option C)
upvoted 12 times
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linuxek21
Highly Voted 1 year, 4 months ago
Selected Answer: C
Correct answer is: C This is the only way to overcome the overlap within the available answers ;)
upvoted 5 times
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Raphaello
Most Recent 4 months, 2 weeks ago
Selected Answer: C
Overlapping CIDR of the 2 VPCs, plus it is better not to open the entire 2 VPCs anyways. VPC service endpoint is the solution. C is the correct answer.
upvoted 2 times
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Marfee400704
6 months, 1 week ago
I think that it's correct answer is A baccording to SPOTO products.
upvoted 1 times
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marfee
6 months, 2 weeks ago
I think that it's correcty answer is C.
upvoted 1 times
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MahmoudKh
9 months, 3 weeks ago
There is no overlap
upvoted 1 times
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Arad
9 months, 4 weeks ago
Selected Answer: C
no doubt C.
upvoted 1 times
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ITgeek
1 year, 4 months ago
The correct answer is C - Create a VPC endpoint service. Associate the VPC endpoint service with the NLB for the web service. Create an interface VPC endpoint for the web service in the existing production VPC. This is because the CIDR blocks of the two VPCs overlap, making VPC peering or a transit gateway not feasible. Option B to redeploy the web service into the production VPC would also be disruptive to the existing environment. Option A to create a VPC peering connection with routing rules to allow data flow is not feasible due to the overlapping CIDR blocks. Option C involves creating an interface VPC endpoint for the web service in the existing production VPC, which allows the web service to be accessed from the production environment without requiring a direct connection between the two VPCs.
upvoted 3 times
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titi_r
1 year, 4 months ago
Selected Answer: C
C - correct.
upvoted 2 times
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helloworldabc
1 year, 5 months ago
AAAAAAAAA
upvoted 2 times
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zaazanuna
1 year, 5 months ago
A - correct.
upvoted 4 times
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