DNS Record Creation in Amazon Route 53
Question
A start-up firm has configured an Amazon S3 bucket as a static website with a DNS registered name as test.com.
For an appropriate record to be created in Amazon Route 53, the deployment team is seeking your advice.
Also, they are looking for TTL values that can be set for these records. Which of the following can be used for the creation of records within Amazon Route 53?
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D.Correct Answer: D.
Alias records can be used to map a DNS record test.com to the Amazon S3 bucket static website.
With Alias records, custom TTL values cannot be set.
Only default TTL values are used.
Option A is incorrect as with Alias record, a custom TTL value cannot be set.
Route 53 uses default TTL values for the resource.
Options B and C are incorrect as CNAME record cannot be used for apex records, i.e., for test.com.
For more information on Apex records with Amazon Route 53, refer to the following URLs,
https://aws.amazon.com/route53/faqs/ https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/resource-record-sets-choosing-alias-non-alias.htmlThe correct answer is A. Create an Alias record for the domain name test.com with custom TTL values.
When configuring an Amazon S3 bucket as a static website with a DNS registered name such as test.com, it is necessary to create a record in Amazon Route 53 to map the domain name to the S3 bucket.
An Alias record is the appropriate type of record to create in Route 53 for this purpose, as it allows you to map a domain name to an AWS resource, such as an S3 bucket or CloudFront distribution, using the domain name of the resource itself. This provides several benefits, such as automatic DNS failover and reduced latency.
Custom TTL values can be set for the Alias record to control how long DNS resolvers should cache the record. This can be useful for managing changes to the mapping between the domain name and the AWS resource. A shorter TTL value can reduce the time it takes for changes to take effect, but can also increase the load on DNS resolvers.
CNAME records should not be used to map a domain name to an S3 bucket, as this can cause issues with SSL/TLS certificate validation. In addition, Route 53 does not allow CNAME records for the root domain (e.g. test.com), only for subdomains (e.g. www.test.com).
Default TTL values can also be used for the Alias record, but custom values allow more control over DNS caching behavior.
