AWS Certified Advanced Networking – Specialty (ANS-C01) — Question 104

A company uses Amazon Route 53 to register a public domain, example.com, in an AWS account. A central services group manages the account. The company wants to create a subdomain, test.example.com, in another AWS account to offer name services for Amazon EC2 instances that are hosted in the account. The company does not want to migrate the parent domain to the subdomain account.

A network engineer creates a new Route 53 hosted zone for the subdomain in the second account.

Which combination of steps must the network engineer take to complete the task? (Choose two.)

Answer options

• A. Add records for the hosts of the new subdomain to the new Route 53 hosted zone.
• B. Update the DNS service for the parent domain by adding name server (NS) records for the subdomain.
• C. Update the DNS service for the subdomain by adding name server (NS) records for the parent domain.
• D. Create an alias record from the parent domain that points to the hosted zone for the subdomain in the second account.
• E. Add a start of authority (SOA) record in the parent domain for the subdomain.

Correct answer: A, B

Explanation

The correct steps are A and B. Step A ensures that the new hosted zone for the subdomain has the necessary records to resolve the hosts, while step B is crucial for linking the parent domain to the subdomain by specifying the name servers in the parent domain's DNS configuration. Options C, D, and E are incorrect because they either suggest unnecessary actions or do not address the requirements of setting up the subdomain properly.