Internet and World Wide Web TechnologiesDomain Name HierarchiesSlide 3ICANNMap of the Internet (US)USA: Pioneers of the InternetClient Server ModelProtocolsInternet and World Wide Web TechnologiesE-commerce Book Chapter 3pages 116-182Concentrate on 162-171Domain Name HierarchiesDomain Name HierarchiesICANN•Internet Corporation for Assigned Numbers and Networks.•Global coordinator of IP Address and Domain names.•Registrars like GoDaddy are “licenses” by ICANN to register domain names.•Large Internet Providers also “secure” IP addresses and farm them out to smaller ISPs.Map of the Internet (US)•http://www.cs.siena.edu/~ebreimer/courses/csis-116-s07/Internet_map_labels.pdf•The above is a partial map as seen from one location (Lumeta.com).USA: Pioneers of the Internet•The United States pioneered the Internet, and thus, “owns” the largest chunk of the infrastructure.•Western Europe, Japan, and Australia were quick to follow.•Eastern Europe, Russia and China are just getting established•Parts of Asia are next: India •South America and Africa may be decades awayClient Server Model•Do not forget that the Internet and WWW use this model extensively.Protocols•HTTP / HTTPS – Hypertext Transfer Protocol (Secure)•FTP / SFTP – (Secure) File Transfer Protocol•SMTP – Simple Mail Transfer Protocol•POP – Post Office Protocol•IMAP – Internet Message Access Protocol•Telnet – Terminal