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Your company registers a domain name of contoso.com.
You create an Azure DNS zone named contoso.com, and then you add an A record to the zone for a host named www that has an IP address of 131.107.1.10.
You discover that Internet hosts are unable to resolve www.contoso.com to the 131.107.1.10 IP address.
You need to resolve the name resolution issue.
Solution: You create a PTR record for www in the contoso.com zone.
Does this meet the goal?
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A. B.B
Modify the Name Server (NS) record.
https://docs.microsoft.com/en-us/azure/dns/dns-delegate-domain-azure-dnsNo, creating a PTR record for www in the contoso.com zone does not meet the goal of resolving the name resolution issue.
A PTR (Pointer) record is used to map an IP address to a domain name. However, in this scenario, the issue is with resolving the domain name (www.contoso.com) to an IP address, not the other way around. Therefore, creating a PTR record will not resolve the issue.
To resolve the issue, you need to ensure that the DNS records for the contoso.com zone are configured correctly. Specifically, you should verify that the name servers for the domain name contoso.com are set to the Azure DNS name servers, and that the A record for the host www is configured correctly with the IP address 131.107.1.10.
You can verify the configuration of the DNS records using a DNS lookup tool, such as nslookup or dig. For example, running the command "nslookup www.contoso.com" should return the IP address 131.107.1.10 if the DNS records are configured correctly.
Once the DNS records are correctly configured, Internet hosts should be able to resolve www.contoso.com to the IP address 131.107.1.10.