AWS Certified SysOps Administrator – Associate — Question 6

A company hosts its website on Amazon EC2 instances behind an Application Load Balancer. The company manages its DNS with Amazon Route 53, and wants to point its domain's zone apex to the website.
Which type of record should be used to meet these requirements?

Answer options

• A. An AAAA record for the domain's zone apex
• B. An A record for the domain's zone apex
• C. A CNAME record for the domain's zone apex
• D. An alias record for the domain's zone apex

Correct answer: D

Explanation

The correct answer is D, an alias record, because it allows the zone apex to point directly to the Application Load Balancer without violating DNS standards. Option A (AAAA) is for IPv6 addresses, option B (A) cannot be used at the zone apex when pointing to another AWS resource, and option C (CNAME) is not permitted for the zone apex.