Google Professional Cloud Network Engineer Question 536
Select 3Google Cloud PlatformYour organization is migrating its on-premises DNS solution to Google Cloud DNS. You need to ensure minimal downtime during the migration and want to validate the new DNS records before switching traffic to Cloud DNS. What steps should you take to achieve this?
- A
Create a managed zone in Cloud DNS and import your existing DNS records into it.
- B
Configure DNS forwarding from your on-premises DNS server to the Cloud DNS managed zone.
- C
Set up a low Time-To-Live (TTL) value for the DNS records in your on-premises DNS server before the migration.
- D
Test the Cloud DNS managed zone by querying it for the imported DNS records.
- E
Immediately update your domain registrar to point to the Cloud DNS name servers.
Show answer and explanation
Correct answers: A, C, D
Explanation
To successfully migrate to Cloud DNS with minimal downtime, you need to replicate your DNS records in a managed zone, set a low TTL value to reduce propagation delays, and validate the DNS records by querying the managed zone before making any changes at the domain registrar. This ensures a smooth transition without disrupting services.
- A. Correct.
Correct. Creating a managed zone and importing existing DNS records is a critical step for migrating to Cloud DNS.
- B. Incorrect.
Incorrect. DNS forwarding from on-premises to Cloud DNS is not relevant for this migration scenario. Instead, you need to create and validate managed zones.
- C. Correct.
Correct. Setting a low TTL value ensures quicker propagation of DNS changes, reducing downtime during the migration.
- D. Correct.
Correct. Testing the managed zone and validating imported records helps ensure the accuracy of the migration before switching traffic.
- E. Incorrect.
Incorrect. Immediately updating the domain registrar can lead to traffic being routed to potentially untested or incorrect DNS records.