7. Internet: Authoritive DNS Servers Resolver: gethostbyname(www.microsoft.com) Server: www.microsoft.com is 1.2.3.4 Client Caching DNS Server dns.microsoft.com dns.hacker.com

8. gethostbyname(www.hacker.com) www.hacker.com is 1.2.3.4 And www.microsoft.com is 5.5.5.5 Server DNS Cache: www.hacker.com = 1.2.3.4 www.microsoft.com = 5.5.5.5 Client

9. gethostbyname(www.microsoft.com) www.microsoft.com is 6.6.6.6 Server Client

12. gethostbyname(www.microsoft.com) Server www.microsoft.com is 6.6.6.6 I don’t know… I better ask somebody else www.microsoft.com is 1.2.3.4 gethostbyname(www.microsoft.com) First answer wins! Client

16. Request Content Censorship