Exam AWS Certified SysOps Administrator - Associate topic 1 question 5 discussion

Letter D is correct. Route 53 supports redirection of zone apex to the ALB via alias. https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/resource-record-sets-choosing-alias-non-alias.html https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/routing-to-elb-load-balancer.html

D. An alias record for the domain's zone apex

D is the correct answer. The DNS protocol does not allow you to create a CNAME record for the top node of a DNS namespace, also known as the zone apex. For example, if you register the DNS name example.com, the zone apex is example.com. You cannot create a CNAME record for example.com, but you can create CNAME records for www.example.com, newproduct.example.com, and so on. Amazon Route 53 also supports alias records, which allow you to route queries to selected AWS resources, such as CloudFront distributions and Amazon S3 buckets. Aliases are similar in some ways to the CNAME record type; however, you can create an alias for the zone apex. For more information, see Choosing between alias and non-alias records. https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/ResourceRecordTypes.html#CNAMEFormat

Answer is D

D IS CORRECT

D. The alias record is used to route the domains top node i.e zone apex i.e. example.com. You can't create a CNAME record for the top node and A and AAAA records are for routing to IPv4 and IPv6 respectively

D. An alias record for the domain's zone apex

answer is D

An A record for the domain's zone apex answer B correct answer

answer B

The DNS protocol does not allow you to create a CNAME record for the top node of a DNS namespace, also known as the zone apex. For example, if you register the DNS name example.com, the zone apex is example.com. You cannot create a CNAME record for example.com, but you can create CNAME records for www.example.com, newproduct.example.com, and so on. In addition, if you create a CNAME record for a subdomain, you cannot create any other records for that subdomain. For example, if you create a CNAME for www.example.com, you cannot create any other records for which the value of the Name field is www.example.com.

dddddddd

Ans: D

Ans: D

Alias: Used to map DNS record to Amazon S3 bucket static website.

D. Cannot create CNAME record for zone apex. AAAA and A are address records, which translates website names to IPv6 and IPv4 addresses respectively.

Answer is D Can’t create a CNAME record for the top node of a DNS namespace (Zone Apex) • Example: you can’t create for example.com, but you can create for www.example.com