Chapter 2 - Chapter 2 The Internet Networks A network is an...

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Chapter 2 The Internet
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Networks network  is an interconnected collection of  computers and devices connected together  via communications devices and media  such as: Computers of all kinds and sizes, Printers and other input/output devices, Modems, cable modems, similar devices, Telephone lines, various kinds of cable, Microwave, satellite, wireless connections. The Internet is a Network of Networks
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The Internet A worldwide group of connected  networks that  allow public access  to information and services Largest network in the world – A  network of networks Not owned or controlled by any  single organization Estimated over 800 million users,  over 100 countries
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History Of The Internet Began with the Advanced Research Projects  Agency (ARPA) - ARPANET Started in September 1969 consisting of four host  nodes (computers) at: University of California at Los Angeles Stanford Institute University of California at Santa Barbara University of Utah Over 100 million hosts connected today A host is any computer that connects to the  Internet
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History Of The Internet The National Science Foundation (NSF)  originally provided the backbone Today, the infrastructure for the Internet is  privatized and provided by: Communications companies such as Cable companies Telephone companies Satellite companies Other Wireless providers Federal Government
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History Of The Internet The Internet is a public, cooperative,  independent network: No single entity controls or owns it Various organizations help define standards The World Wide Web Consortium ( W3C ) Oversees  research and set standards and guidelines ICANN – Internet Corporation for Assigned Names and  Numbers   Internet2 ( I2 ) is an Internet research and development project Develops and tests advanced Internet technologies Provides a high speed Internet within the Internet
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Connecting to the Internet Data is sent via networks and communications  channels owned by many companies which will  provide service to us – for a fee Internet Service Providers Have permanent connections to the Internet Provide temporary connections to individuals  and companies for a fee Point of presence (POP) – points to connect to Regional and National ISP’s Online service providers Supplies members only features, e.g. AOL
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There are a number of ways to  connect: Dial-up access – lower speed  connections Home or small business Modem, computer and telephone line are used Dial into an access point, to a phone number  provided
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High Speed Connections
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Chapter 2 - Chapter 2 The Internet Networks A network is an...

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