AWS Certified Advanced Networking – Specialty (ANS-C01) — Question 125

A company wants to migrate its DNS registrar and DNS hosting to Amazon Route 53. The company website receives tens of thousands of visits each day, and the company’s current DNS provider cannot keep up. The company wants to migrate as quickly as possible but cannot tolerate any downtime.

Which solution will meet these requirements?

Answer options

• A. Transfer the domain name to Route 53. Create a Route 53 private hosted zone, and copy all the existing DNS records. Update the name servers on the domain to use the name servers that are specified in the newly created private hosted zone.
• B. Copy all DNS records from the existing DNS servers to a Route 53 private hosted zone. Update the name servers with the existing registrar to use the private hosted zone name servers. Transfer the domain name to Route 53. Ensure that all the changes have propagated.
• C. Transfer the domain name to Route 53. Create a Route 53 public hosted zone, and copy all the existing DNS records. Set the TTL value on each record to 1 second. Update the name servers on the domain to use the name servers that are specified in the newly created public hosted zone.
• D. Copy all DNS records from the existing DNS servers to a Route 53 public hosted zone. Update the name servers with the existing registrar to use the Route 53 name servers for the hosted zone. When the changes have propagated, perform a domain name transfer to Route 53.

Correct answer: D

Explanation

Option D is correct because it allows for a seamless transition by ensuring that DNS records are in place before the domain transfer. This minimizes downtime as the existing name servers will point to the new hosted zone during the transition. Options A and C involve private hosted zones which are not suitable for public DNS, and option B may cause downtime during the transfer process.