Exam AWS Certified SysOps Administrator - Associate topic 1 question 23 discussion

The correct answer is D. You should create an ALIAS record in Route 53 to point the website’s apex domain name (e.g., company.com) to the Application Load Balancer. An ALIAS record is a Route 53-specific extension to DNS that allows you to map the apex domain name to another AWS resource, such as an Application Load Balancer.

Not CNAME, as CNAME can not be applied to root domain level.

ALIA -> APEX https://docs.aws.amazon.com/govcloud-us/latest/UserGuide/setting-up-route53-zoneapex-elb.html

Option D is the correct answer. An ALIAS record is a Route 53 extension to DNS that provides a Route 53-specific alias for a resource record set. When Route 53 receives a DNS query for a domain name that is associated with an ALIAS record, Route 53 responds with the IP address of the resource that is specified in the record. An ALIAS record can be used to map an apex domain name to an Application Load Balancer. In this case, the ALIAS record points to the DNS name of the Application Load Balancer. A CNAME record is a type of DNS record that points one domain name to another. However, CNAME records cannot be used to map an apex domain name to an Application Load Balancer. An SOA (Start of Authority) record is a DNS record that specifies authoritative information about a DNS zone, such as the email address of the person responsible for managing the zone. A TXT record is a type of DNS record that is used to associate some arbitrary text with a DNS record. It is not used to map domain names to IP addresses or to other domain names.

dddddd

Only D, when pointing to resource names the record is Alias

Ans: D

D. SOA and TXT are definitely wrong. CNAME allows you to map names, but only for non zone apex addresses (ie m.example.com to mobile.example.com)

D, "Route 53 supports the alias resource record set, which lets you map your zone apex (e.g. example.com) DNS name to your load balancer DNS name."

Definitely

The answer is D

We can't use ALIAS with root domain "apix"

I am going with D