12.The.Internet - 1 he Internet With thanks to Dr. Haipeng...

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Unformatted text preview: 1 he Internet With thanks to Dr. Haipeng Guo and Mr. Mark Clulow Lecture 12 2 Outline r What is the Internet? r History of the Internet r Who is Using the Internet r How to connect to the Internet r How the Internet works r Software and services supported by the Internet s WWW s Email s FTP s Search Engines 3 hat is a Network? s Collection of computers and devices connected to share information and resources 4 hat is a LAN? s Local Area Network s Network in limited geographical area such as home or office building 5 hat is a WAN? s Wide Area Network s Network that covers large a geographical area using many types of media 6 hat is the Internet? r A network of computer networks worldwide r The Internet is world ’ s largest WAN r Also called the information highway , the net , or cyberspace 7 History of the Internet 1957- the USSR launched Sputnik, the first artificial earth satellite 1958- In response, the US Department of Defense established the A dvanced R esearch P rojects A gency ( ARPA ) Several years later ARPA began to focus on computer networking and communications technology 8 Idea of Package Switching r In 1961, Dr. Leonard Kleinrock created the basic principles of packet switching , the technology underpinning the Internet, while a graduate student at MIT First node on the Internet 9 ARPANET r In 1969 ARPANET was constructed r It is a network of four computers s UCLA s SRI (Stanford) s UCSB s University of Utah The first message: lo….gin 10 Internet Today r The Internet has grown from four host computer systems to many millions r By 1984, ARPANET had more than 1,000 individual computers linked as hosts r In 1992, the Web Wide Web protocol was released s ARPANET had more than 1 million computers linked as hosts r Today, more than 150 million hosts connect to the Internet r In 2005, China’s Internet population was 111 million 11 Rapid Growth r Internet usage rose over 300% between 2000 and 2008 r Africa's Internet Usage rose by 1,031%...
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This note was uploaded on 03/28/2010 for the course COMPUTER H 2012 taught by Professor Dave during the Spring '10 term at Quebec Abitibi-Temiscamingue.

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12.The.Internet - 1 he Internet With thanks to Dr. Haipeng...

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