Cos 125 Day 1 5/14/2019 © Tony Gauvin, UMFK 2004

Agenda Roll Call Introduction WebCT Overview Syllabus Review Class Web Site Understanding the Internet’s Underlying Architecture What is the Internet? How Computers Networks Send Data Across the Internet. 5/14/2019 © Tony Gauvin, UMFK 2004

INSTRUCTOR Tony Gauvin, Assistant Professor of E-Commerce Contact info 216 Nadeau TonyG@maine.edu (207) 834-7519 or ext 7519 WebCT (Tony Gauvin COS 125) 5/14/2019 © Tony Gauvin, UMFK 2004

Instructional Philosophy Out-Come based education Would rather discuss than lecture Requires student preparation Hate grading assignments Especially LATE assignments Use class interaction, assignments, quizzes and projects to determine if outcomes are met. 5/14/2019 © Tony Gauvin, UMFK 2004

COS 125 Survival Primer Check WebCT Often Read Material BEFORE the class discussion Check WebCT Often Use the additional resources identified in syllabus ASK questions about what you didn’t understand in readings DON’T do assignments and projects at last minute. REVEIW lectures and notes Seek HELP if you are having difficulties OFFER feedback and suggestions to the instructor in a constructive manner 5/14/2019 © Tony Gauvin, UMFK 2004

Computer Accounts Computer login MSDN Academic Alliance Access Cards Sys admin Pete Cyr (x7547) or Art Drolet (x7809) Applications MSDN Academic Alliance Free Stuff See Dr Ray Albert Access Cards $10 deposit See Lisa Fournier 5/14/2019 © Tony Gauvin, UMFK 2004

WebCT http://webct.umfk.maine.edu Login First name. Last Name John Doe  John.Doe Initial password is webct Help with WebCT available from Blake Library staff All quizzes and assignments will be administered from WebCT Class website http://perleybrook.umfk.maine.edu/classes/cos125/ 5/14/2019 © Tony Gauvin, UMFK 2004

Syllabus review Requirements Grading Course outline Special Notes Subject to change 5/14/2019 © Tony Gauvin, UMFK 2004

What is the Internet? How was the Internet built? How is it organized? Who runs the Internet? Who pays for the Internet? 5/14/2019 © Tony Gauvin, UMFK 2004

Timeline for the Internet 1961 MIT Grad student Leonard Kleinrock published on “packet switching” 1966 ARPANET 1970 NCP developed 1971 First E-mail 1972 62 Hosts 1974 TCP/IP developed by Kahn and Cerf 1976 UUCP 1979 Usenet 1983 TCP/IP replaces NCP 5/14/2019 © Tony Gauvin, UMFK 2004

Timeline Continued 1983 Internet Activities Board oversees technology development 1983 500 hosts 1984 DNS 1984 1000 hosts 1984 JUNET, BITNET, CSNET 1986 NSFNET Super Computers 1988 Morris worm (1st virus!) 1988 CERT formed 1989 100,000 hosts 5/14/2019 © Tony Gauvin, UMFK 2004

Timeline Continued 1990 ARPANET retired 1991 U of Minnesota develop Gopher 1991 WWW released at CERN 1992 MBONE 1992 ISOC formed 1992 1,000,000 hosts 1993 Mosaic developed by Marc Andresen and Eric Bina 1993 Whitehouse goes on-line 1993 InterNIC 1993 2,000,000 hosts 5/14/2019 © Tony Gauvin, UMFK 2004

Timeline Continued 1994 The Rolling Stones broadcast the Voodoo Lounge Tour over MBone 1995 vBNS (start of the commercial Internet) 1995 Sun Microsystems invents JAVA 1996 10,000,000 hosts 1996 Telecomincations Act 1997 DNS Hack (successfully) 2000 100,000,000 hosts 2002 DNS system hacked again (unsuccessfully) 2003 approaching 200,000,000 hosts 5/14/2019 © Tony Gauvin, UMFK 2004

Who runs the Internet? No Centralized Management Thousands of individual networks that cooperate Rules for cooperation are the RFC’s The Internet Society is the main organizing body www.isoc.org Internet Architecture Board www.iab.org Internet Engineering Task Force www.ietf.org World Wide Web Consortium www.w3.org 5/14/2019 © Tony Gauvin, UMFK 2004

Organzational Chart 5/14/2019 © Tony Gauvin, UMFK 2004

Other Internet Players InterNIC www.internic.net/ Registers names and addresses Registrars Private companies that do the same as InterNIC ISPs Internet Service Providers Networks providers Local Regional Backbone 5/14/2019 © Tony Gauvin, UMFK 2004

How the Computers Networks work Computers are connected to LANS Local Area Networks Hubs Bridges Switches Repeaters Gateways Data is sent on packets using TCP/IP LANS are Connected by routers to WANS Wide Area Networks are owned by Private Telecommunications Companies Everything eventually connects to the Internet Backbones at NAP (Network access points) 5/14/2019 © Tony Gauvin, UMFK 2004

Internet Webserver User PC Internet Backbone (Multiple Carriers) Router ISP ISP Internet Service Provider Internet Service Provider 5/14/2019 © Tony Gauvin, UMFK 2004

Internet Connections 5/14/2019 © Tony Gauvin, UMFK 2004

Networking Terms T1, T3, 56K DSL ISDN LAN Types Leased lines Digital Subscriber lines ISDN Integrated Services digital Network LAN Types Ethernet Token ring Wireless 5/14/2019 © Tony Gauvin, UMFK 2004

Perceptions What is the Internet? What significant changes in the Internet do you foresee within the next five years? How does the Internet benefit you? How does the Internet benefit society? Are there negative aspects of the Internet? 5/14/2019 © Tony Gauvin, UMFK 2004

For Next Class Read Chap 1-6 in HITW Check out all parts of WebCT Make sure you have read and understand Course Syllabus. Assignment #1 will be assigned next class 5/14/2019 © Tony Gauvin, UMFK 2004