Internet and World Wide Web Technologies E-commerce Book Chapter 3 pages Concentrate on

Domain Name Hierarchies

ICANN 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) s/csis-116-s07/Internet_map_labels.pdfhttp:// s/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 away

Client 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 Emulation