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Which type of DNS record should you create?

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(@pesterfieldrayford)
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You have an Azure Active Directory (Azure AD) tenant named contosocloud.onmicrosoft.com.

Your company has a public DNS zone for contoso.com.

You add contoso.com as a custom domain name to Azure AD.

You need to ensure that Azure can verify the domain name.

Which type of DNS record should you create?

  • A . PTR
  • B . MX
  • C . NSEC3
  • D . RRSIG

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Suggested Answer: B

Explanation:

TXT or MX : Correct

You can use either a TXT or MX record to verify the custom domain in the Azure AD. MX records can serve the purpose of TXT records

SRV : Incorrect

SRV records are used by various services to specify server locations. When specifying an

SRV record in Azure DNS

DNSKEY : Incorrect Choice

This will verify that the records are originating from an authorized sender. NSEC : Incorrect Choice

This is Part of DNSSEC. This is used for explicit denial-of-existence of a DNS record. It is used to prove a name does not exist.

Reference:

https://docs.microsoft.com/en-us/azure/dns/dns-web-sites-custom-domain

https://docs.microsoft.com/en-us/azure/active-directory/fundamentals/add-custom-domain#verify-your-custom-domain-name

https://www.cloudflare.com/dns/dnssec/how-dnssec-works/#:~:text=DNSKEY%20%2D%20Contains%20a%20public%20signing,s)%20in%20th e%20parent%20zone.


   
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