2nd lecture MMC1
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Transcript of 2nd lecture MMC1
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2ND LECTUREMMC1
Computer Application in Mass Comm.
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What is Internet? Interconnection of computers and
computer networks using TCP/IP communication protocol
• Transport Control Protocol/ Internet Protocol (TCP/IP)
• What is a protocol?
– A protocol is a set of rules defining
communication between systems
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History of internet It was invented by Al Gore Early 1960’s - DARPA (ARPA in 1960’s)
project headed by Licklider Late 1960’s - ARPANET & research on packet
switching by Roberts First node installed by BBN at UCLA in September
1969 1969 - Four host computers (UCLA, SRI, UCSB,
University of Utah)
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ARPANET, 1980
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1969 - RFCs begun by S. Crocker (http://rfc.sunsite.dk/)
1972 - Email by Ray Tomlinson & Larry Roberts
1970’s - TCP by Vint Cerf & Bob Kahn Evolved into TCP/IP, and UDP
1980s – Hardware Explosion (LANs, PCs, and workstations) 1983 – Ethernet by Metcalfe
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Tim Berners-Lee at CERN in 1989Proposal for WWW in 1990First web page on November 13, 1990
Hypertext - Text that contains links to other text.Ted Nelson’s XanaduVannevar Bush’s Memex
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Communicating Via the Internet
Network
MSN Messenger
How’s theweather inSeattle, Mar?
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Search Engines
www.google.com
www.dogpile.com
www.ask.com
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AllTheWeb.comhttp://www.alltheweb.com
AOL Searchhttp://aolsearch.aol.com (internal)http://search.aol.com/(external)
HotBothttp://www.hotbot.com
AltaVistahttp://www.altavista.com
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Gigablasthttp://www.gigablast.com
Live Searchhttp://www.live.com/
LookSmarthttp://www.looksmart.com
Lycoshttp://www.lycos.com
Netscape Searchhttp://search.netscape.com