DNS

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