The Internet AIMS 2710 R. Nakatsu. History Of The Internet: Origins The Internet has its roots in the U.S. military, which funded a network in 1969 called.

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Presentation transcript:

The Internet AIMS 2710 R. Nakatsu

History Of The Internet: Origins The Internet has its roots in the U.S. military, which funded a network in 1969 called ARPANET. Computers at colleges and universities were interconnected. Web did not exist Largely a linear text-based medium Little interactivity

History Of The Internet: Evolution In the late 1980’s ISP (Internet Service Providers) began offering dial-up Internet accounts for a monthly fee, giving users access to , discussion groups, and file transfers. In 1989, the World Wide Web was born. By the early 1990s the combination of , the Web, and interactive services such as online chat propelled the Internet to international prominence. Today, Web 2.0 sites offer increased interactivity (social media, blogging)

How does the Internet work? Packet-switched network: information is broken into packets by TCP/IP. Dynamic routing: even if one part of the network is knocked out, packets can be rerouted around the problem. DemoDemo High-speed backbones are fiber-optic trunk lines. Highly decentralized: millions of servers reside all over the world; nobody really “owns” the Internet

High-Speed Backbones dOyKdJWPlZY

DNS (Domain Name System) The DNS was created in Its purpose is to map text (web addresses) to IP addresses automatically. Question: What is an IP address? IP addresses are usually displayed as a string of four numbers between 0 and 255, separated by three periods. E.g.,

How do you create a web presence? Domain name registrar: you need to register your web site’s name. You pay a fee for the right to use that name. Web hosting companies: these companies run your web site on their servers for a fee. ICANN is the governing body that manages IP addresses and domain names.