Delegation lists all authoritative servers for a domain

• The concept of ìdelegationî is built into the DNS

• The concept of ìprimaryî versus ìsecondaryî name server is built into BIND

• Common (incorrect) myths:

  • Primary servers are queried first

    • DNS doesnít know!
  • Secondary servers are only used when primary servers fail

    • DNS doesnít know!

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