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Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 185 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01
Question #: 185
Topic #: 1
[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

A company securely connects resources that are in its VPC to a software as a service (SaaS) solution from a SaaS provider. The SaaS solution is hosted in the AWS Cloud and is powered by AWS PrivateLink. The company uses a PrivateLink endpoint to access the SaaS solution behind the SaaS provider's Network Load Balancer (NLB).

The company recently added a new Availability Zone and new subnets to its VPC. A network engineer is unable to deploy a new interface VPC endpoint for the SaaS solution in the new Availability Zone.

What is the cause of this problem?

  • A. The CIDR block of the new subnets conflicts with the SaaS provider's CIDR block.
  • B. The enableDnsHostnames attribute and enableDnsSupport attribute were not configured on the new subnets in the new Availability Zone.
  • C. The SaaS provider does not offer the solution in the new Availability Zone and has not configured cross-zone load balancing for the NLB.
  • D. The new subnets are missing a route to the VPC internet gateway.
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Suggested Answer: C 🗳️
by rdiaz at June 12, 2024, 10:02 p.m.
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woorkim
1 month, 2 weeks ago
C is right! A: CIDR block conflicts are not relevant here, as PrivateLink operates at the network interface level and is independent of the CIDR block configuration of the VPC. B: The enableDnsHostnames and enableDnsSupport attributes are required for DNS resolution of private endpoints, but their absence would not block the creation of an endpoint in a specific Availability Zone. D: The new subnets do not need a route to an internet gateway to use AWS PrivateLink, as it operates within the AWS network and does not rely on public internet routing.
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cas_tori
4 months, 4 weeks ago
Selected Answer: C
this is C
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Akshay0403
6 months ago
Selected Answer: C
AWS PrivateLink endpoints require the service to be available in the Availability Zone where the endpoint is being created. If the SaaS provider does not offer the service in the new Availability Zone and cross-zone load balancing is not configured for the NLB, the endpoint cannot be deployed in that Availability Zone. This is a likely cause of the problem because the endpoint creation depends on the service being present and accessible in the desired Availability Zone.
upvoted 2 times
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rdiaz
7 months, 2 weeks ago
Selected Answer: C
https://docs.aws.amazon.com/whitepapers/latest/aws-privatelink/creating-highly-available-endpoint-services.html
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