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How to Test the DNS Delegation

DNS, or domain name system, matches websites such as "website.com" to IP addresses. DNS delegation allows server administrators to delegate DNS subdomains to other IP addresses, for example, "otherwebsite.website.com" could go to a completely separate IP address. The administrators of "otherwebsite.website.com" are responsible for this DNS record, allowing subdomains of a single domain to be hosted on different servers or even by different companies. Microsoft's "Dcdiag" command-line tool can test and report whether DNS delegation is functioning properly.

Instructions

    • 1

      Download and install Microsoft's Remote Server Administration Tools package (see Resources.) If you're running a server edition of Windows, these tools are already installed.

    • 2

      Click "Start," click "All Programs," click "Accessories," right-click "Command Prompt and click "Run as Administrator."

    • 3

      Click "Yes" to the user account control prompt, if one appears.

    • 4

      Type "Dcdiag.exe /test:DNS /DnsDelegation" into the command prompt window and press "Enter."

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