Learn how to delegate a subdomain, like developer.contoso.com, to a separate DNS zone in Azure. Follow the correct steps to manage subdomains efficiently in the AZ-700 certification exam. Get expert tips and clear solutions!
Table of Contents
Question
You manage an Azure Public DNS zone for a domain named contoso.com.
You want to delegate a subdomain named developer.contoso.com to a separate zone that will be managed separately from the contoso.com zone.
What should you do?
A. In the DNS zone of contoso.com, create a PTR record set with a domain name of developer.contoso.com.
B. In the DNS zone of contoso.com, create an NS record set named “developer” and add developer.contoso.com name servers.
C. In the DNS zone of developer.contoso.com, create a CNAME record set named “@” with an alias of “contoso.com”.
D. In the DNS zone of developer.contoso.com, create an NS record set named “@” and add contoso.com name servers.
Answer
B. In the DNS zone of contoso.com, create an NS record set named “developer” and add developer.contoso.com name servers.
Explanation
To manage a subdomain in a separate DNS zone, you need to create an NS record that contains the name servers of the subdomain’s DNS zone.
A and C are incorrect because you do not need to create a CNAME record in the subdomain’s DNS zone. A PTR record is used for reverse DNS look up from an IP address to a name. This is not used for subdomain delegation.
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