1. DNS DOMAIN NAME SYSTEM NAME SYSTEM By Lijo George

2. WHY DOES ANYONE NEED DNS ?

3. BROWSING WITH DNS BROWSING W/O DNS

4. HISTORY

5. HOST NAME RESOLUTION

7. DDNS ARCHITECTURE

8. FQDN

9. ROOT NAME SERVERS A - VeriSign Global Registry Services B - Information Sciences Institute C - Cogent Communications D - University of Maryland E - NASA Ames Research Center F - Internet Systems Consortium, Inc. G - U.S. DOD Network Information Center H - U.S. Army Research Lab I - Autonomica/NORDUnet J - VeriSign Global Registry Services K - RIPE NCC L - ICANN M - WIDE Project

10. TLDs

11. PRIVATE DOMAINS

12. DNS QUERY

13. DNS RESOLUTION PROCESS

14. SAMPLE RESOLUTION

15. CACHING

16. DNS RESOLVER CACHE

17. DNS SERVER CACHE

18. DNS ZONES

19. TTL

20. DNS RECORDS

24. ONLINE TOOLS