AWS Certified Advanced Networking – Specialty (ANS-C00) — Question 5

Your organization's corporate website must be available on www.acme.com and acme.com.
How should you configure Amazon Route 53 to meet this requirement?

Answer options

• A. Configure acme.com with an ALIAS record targeting the ELB. www.acme.com with an ALIAS record targeting the ELB.
• B. Configure acme.com with an A record targeting the ELB. www.acme.com with a CNAME record targeting the acme.com record.
• C. Configure acme.com with a CNAME record targeting the ELB. www.acme.com with a CNAME record targeting the acme.com record.
• D. Configure acme.com using a second ALIAS record with the ELB target. www.acme.com using a PTR record with the acme.com record target.

Correct answer: A

Explanation

The correct answer, A, is appropriate because both acme.com and www.acme.com should use ALIAS records to point to the Elastic Load Balancer (ELB), ensuring proper routing. Option B is incorrect because using a CNAME for www.acme.com would not allow the root domain (acme.com) to work correctly. Option C incorrectly suggests using CNAME records for both domains, which is not valid for the root domain. Option D is incorrect as PTR records are not used for this type of configuration.