DNS

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Across
  1. 1. Component of a domain name, limited to 63 characters
  2. 4. Client program that sends DNS queries for applications
  3. 7. Entity that registers domain names into the DNS database
  4. 10. Top-level domain category not tied to country codes
  5. 12. Top-level domain category representing specific nations
  6. 14. Individual entry stored in a DNS zone file
  7. 16. Secondary server periodically checking primary for updates
  8. 17. Temporary storage of DNS results to speed later lookups
  9. 19. Method where DNS server returns referral information to the client
  10. 23. System allowing dynamic updates to DNS records without manual edits
  11. 26. Field used to match a DNS response with its original query
  12. 28. Flag indicating DNS answer came from cache and not authoritative data
  13. 30. Message returned by DNS server containing requested data
  14. 31. Response directing a resolver to another DNS server for answers
Down
  1. 2. Section listing servers that are authoritative for the queried domain
  2. 3. Server that copies zone data from the primary and does not modify it
  3. 5. Process by which a domain name is translated into an IP address
  4. 6. Well-known port number used for DNS communication
  5. 7. Method where DNS server completes the entire lookup on behalf of client
  6. 8. Administrative portion of domain space managed by a DNS server
  7. 9. Global authority responsible for accrediting registrars
  8. 11. File containing all resource records for a specific DNS zone
  9. 13. Bits that define query type, response type, and error conditions
  10. 15. Protocol delivering binding updates to DNS in dynamic DNS systems
  11. 16. Server that creates, updates, and maintains the zone file
  12. 18. Highest level DNS server that delegates authority to lower domains
  13. 20. Protocol used for DNS messages that exceed 512 bytes
  14. 21. Time limit defining how long a cached DNS record remains valid
  15. 22. Mechanism where the primary actively alerts secondaries about zone changes
  16. 24. Subtree within the hierarchical DNS structure
  17. 25. Core system that maps human-readable names to machine IP addresses
  18. 27. Domain used to map IP addresses back to hostnames
  19. 28. Protocol used by DNS for small messages under 512 bytes
  20. 29. Message sent from resolver requesting domain information