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Why does a domain-joined machine configured to use a public DNS resolver fail to reach internal servers?

  1. A Public resolvers have no records for internal domain names
  2. B Public resolvers are slower
  3. C Public DNS blocks private IPs
  4. D The firewall rejects public DNS
Answer

Public resolvers have no records for internal domain names

Domain members should point at domain controllers for DNS. This misconfiguration is one of the most common causes of internal name resolution failure.

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