A company hosts its website on Amazon ECF2 instances behind an ELB 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?
An AAA record for the domain’s zone apex
An A record for the domain’s zone apex
A CNAME record for the domain’s zone apex
An alias record for the domain’s zone apex
Explanations:
AAAA records are used for IPv6 addresses, but this question involves load balancing, not IPv6.
Standard A records are not suitable for pointing to AWS resources like ELB for a zone apex.
CNAME records cannot be used at the zone apex; they are for subdomains and specific hostnames.
Alias records can be used at the zone apex to point to AWS resources, like an ELB.
I opine that the answer is:
An alias record for the domain’s zone apex