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ANS-C01: Centralized DNS Architecture in AWS Seamless Endpoint Resolution & Subdomain Control

Discover how to design a versatile DNS structure in AWS using Route 53. Enable on-premises to AWS endpoint resolution while empowering individual accounts with subdomain management.

Table of Contents

Question

A network engineer is designing the DNS architecture for a new AWS environment. The environment must be able to resolve DNS names of endpoints on premises, and the on-premises systems must be able to resolve the names of AWS endpoints. The DNS architecture must give individual accounts the ability to manage subdomains.

The network engineer needs to create a single set of rules that will work across multiple accounts to control this behavior. In addition, the network engineer must use AWS native services whenever possible.

Which combination of steps should the network engineer take to meet these requirements? (Choose three.)

A. Create an Amazon Route 53 private hosted zone for the overall cloud domain. Plan to create subdomains that align to other AWS accounts that are associated with the central Route 53 private hosted zone.
B. Create AWS Directory Service for Microsoft Active Directory server endpoints in the central AWS account that hosts the private hosted zone for the overall cloud domain. Create a conditional forwarding rule in Microsoft Active Directory DNS to forward traffic to a DNS resolver endpoint on premises. Create another rule to forward traffic between subdomains to the VPC resolver.
C. Create Amazon Route 53 Resolver inbound and outbound endpoints in the central AWS account that hosts the private hosted zone for the overall cloud domain. Create a forwarding rule to forward traffic to a DNS resolver endpoint on premises. Create another rule to forward traffic between subdomains to the Resolver inbound endpoint.
D. Ensure that networking exists between the other accounts and the central account so that traffic can reach the AWS Directory Service for Microsoft Active Directory DNS endpoints.
E. Ensure that networking exists between the other accounts and the central account so that traffic can reach the Amazon Route 53 Resolver endpoints.
F. Share the Amazon Route 53 Resolver rules between accounts by using AWS Resource Access Manager (AWS RAM). Ensure that networking exists between the other accounts and the central account so that traffic can reach the Route 53 Resolver endpoints.

Answer

A. Create an Amazon Route 53 private hosted zone for the overall cloud domain. Plan to create subdomains that align to other AWS accounts that are associated with the central Route 53 private hosted zone.
C. Create Amazon Route 53 Resolver inbound and outbound endpoints in the central AWS account that hosts the private hosted zone for the overall cloud domain. Create a forwarding rule to forward traffic to a DNS resolver endpoint on premises. Create another rule to forward traffic between subdomains to the Resolver inbound endpoint.
E. Ensure that networking exists between the other accounts and the central account so that traffic can reach the Amazon Route 53 Resolver endpoints.

Explanation

To enable DNS resolution between on-premises and AWS endpoints while allowing individual account management of subdomains across multiple AWS accounts, the network engineer should:

  • Create an Amazon Route 53 private hosted zone: Establish a central private hosted zone for the overall cloud domain in Route 53 (Option A). Plan subdomains aligned with associated AWS accounts within this central hosted zone for account-specific management.
  • Utilize Route 53 Resolver endpoints: Set up Amazon Route 53 Resolver inbound and outbound endpoints in the central AWS account hosting the private hosted zone (Option C). Configure forwarding rules to direct traffic between subdomains and towards the DNS resolver endpoint on premises for cross-environment resolution.
  • Establish networking connectivity between accounts: Ensure networking connectivity exists between accounts and the central account for communication with the Route 53 Resolver endpoints (Option E). This connectivity is crucial for routing DNS queries effectively.

By combining these steps, a robust DNS architecture is formed, allowing individual account management of subdomains within a centralized private hosted zone while facilitating DNS resolution between on-premises and AWS endpoints through Route 53 Resolver endpoints.

AWS Certified Advanced Networking – Specialty ANS-C01 certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the AWS Certified Advanced Networking – Specialty ANS-C01 exam and earn AWS Certified Advanced Networking – Specialty ANS-C01 certification.

Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook

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