Which solution will meet these requirements MOST cost-effectively?

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A company’s SysOps administrator deploys a public Network Load Balancer (NLB) in front of the company’s web application.The web application does not use any Elastic IP addresses.Users must access the web application by using the company’s domain name.The SysOps administrator needs to configure Amazon Route 53 to route traffic to the NLB.

Which solution will meet these requirements MOST cost-effectively?

Create a Route 53 AAAA record for the NLB.

Create a Route 53 alias record for the NLB.

Create a Route 53 CAA record for the NLB.

Create a Route 53 CNAME record for the NLB.

Explanations:

AAAA records are used for IPv6 addresses. Network Load Balancers (NLB) are usually referenced by alias records, not by IPv6 addresses directly in Route 53.

Alias records are specifically designed for routing traffic to AWS resources like NLBs and are more cost-effective, as they do not incur Route 53 query charges.

CAA records are used for specifying which certificate authorities (CAs) can issue certificates for a domain. They do not route traffic to an NLB.

CNAME records cannot be created for apex (root) domains and incur additional charges. Alias records are preferred for NLBs, making this option more costly and unsuitable.

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