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Question 280 - SOA-C02 discussion

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A company manages its production applications across several AWS accounts. The company hosts the production applications on Amazon EC2 instances that run Amazon

Linux 2. The EC2 instances are spread across multiple VPCs. Each VPC uses its own Amazon Route 53 private hosted zone for private DNS.

A VPC from Account A needs to resolve private DNS records from a private hosted zone that is associated with a different VPC in Account B.

What should a SysOps administrator do to meet these requirements?

A.
In Account A, create an AWS Systems Manager document that updates the /etc/resolv.conf file across all EC2 instances to point to the AWS provided default DNS resolver for the VPC in Account B.
Answers
A.
In Account A, create an AWS Systems Manager document that updates the /etc/resolv.conf file across all EC2 instances to point to the AWS provided default DNS resolver for the VPC in Account B.
B.
In Account A, create an AWS CloudFormation template that associates the private hosted zone from Account B with the private hosted zone in Account A.
Answers
B.
In Account A, create an AWS CloudFormation template that associates the private hosted zone from Account B with the private hosted zone in Account A.
C.
In Account A, use the AWS CLI to create a VPC association authorization. When the association is created, use the AWS CLI in Account B to associate the VPC from Account A with the private hosted zone in Account B.
Answers
C.
In Account A, use the AWS CLI to create a VPC association authorization. When the association is created, use the AWS CLI in Account B to associate the VPC from Account A with the private hosted zone in Account B.
D.
In Account B, use the AWS CLI to create a VPC association authorization. When the association is created, use the AWS CLI in Account A to associate the VPC from Account B with the private hosted zone in Account A.
Answers
D.
In Account B, use the AWS CLI to create a VPC association authorization. When the association is created, use the AWS CLI in Account A to associate the VPC from Account B with the private hosted zone in Account A.
Suggested answer: D

Explanation:

To resolve DNS across VPCs in different accounts, you should:

Authorization: In Account B, initiate a VPC association authorization for the private hosted zone. This action allows another AWS account to associate a VPC with this hosted zone.

Association: In Account A, after receiving the authorization from Account B, associate its VPC with the private hosted zone that exists in Account B. This step will enable EC2 instances within the VPC in Account A to resolve DNS records hosted in Account B.

AWS Documentation

Reference: AWS provides detailed guidance on associating VPCs with private hosted zones across accounts in their documentation: Associating VPCs and Private Hosted Zones Across Accounts.

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asked 16/09/2024
Andrea Tria
38 questions
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