AWS Certified SysOps Administrator – Associate (legacy) — Question 697

How can the domain's zone apex for example "myzoneapexdomain com" be pointed towards an Elastic Load Balancer?

Answer options

• A. By using an AAAA record
• B. By using an A record
• C. By using an Amazon Route 53 CNAME record
• D. By using an Amazon Route 53 Alias record

Correct answer: D

Explanation

A zone apex (root domain) cannot use a standard CNAME record due to DNS protocol restrictions. Amazon Route 53 Alias records provide a specialized extension that allows you to point your zone apex directly to AWS resources like an Elastic Load Balancer. Standard A, AAAA, and CNAME records are either unsupported at the apex or cannot dynamically track the load balancer's IP addresses.