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BUSI 240Introduction to Information Systems
Tuesday & Thursday 8:05am – 9:30am
Wyant Lecture Hall
Please sign the roster on the back table.
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Current Events – What’s going on?
Bill Gates's successor at Microsoft to retireThe Microsoft Corp executive who took over the role of chief software architect from Bill Gates is to step down, following a tenure in which the Windows-maker lost ground to Google and Apple. http://www.reuters.com/article/idUSTRE69H4Z320101019?type=technologyNews
Apple’s Jobs goes after Google, tablet rivalsIt’s not often Steve Jobs shows up on a routine earnings call. And when he showed up on Monday’s, he made a splash.
Coincidentally showing up right after the company’s shares racked up their largest post-earnings fall in recent memory, Jobs thrashed Google’s Android mobile operating system and a clutch of competitors rushing to stake out territory in the explosive tablet market he helped create. http://blogs.reuters.com/mediafile/2010/10/18/apples-jobs-
goes-after-google-tablet-rivals/
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Current Events – What’s going on?
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Current Events – What’s going on?
Internet users to exceed 2 billion this yearThe number of Internet users will surpass two billion this year, approaching a third of the world population, but developing countries need to step up access to the vital tool for economic growth, a United Nations agency said on Tuesday. http://www.reuters.com/article/idUSTRE69I24720101019?type=technologyNews
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Assignment #2 Due Tuesday, February 24th – before 8:05am
(correction from Tuesday’s slide) Submit via DropBox at online.apu.edu
Quiz #3
Covers Chapter 5 & 6 20 questions, 1 point per question Available Tuesday, February 22, 2011 at
9:30am Due Thursday, February 24, 2011 at 8:00am
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Mid-Term
Covers Chapter 1 thru 6 50 questions, 2 points per question Available Tuesday, March 1, 2011 at 9:30am Due Thursday, March 3, 2011 at 8:00am
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An Intranet
A network inside an organizationThat uses Internet technologies (such as Web
browsers and servers, TCP/IP protocols, HTML, etc.)
To provide an Internet-like environment within the organization
For information sharing, communications, collaboration and support of business processes
Protected by security measures Can be accessed by authorized users through
the Internet
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Enterprise Information Portal
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Extranet
Network links that use Internet technologiesTo connect the Intranet of a businessWith the Intranets of its customers, suppliers or
other business partners
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Extranet Uses
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The Origins of the Internet Project: Department of Defense’s Advanced Research
Projects Agency (DARPA) in 1969. Goal: develop a wartime digital communications network Specifications: The network must be able to quickly
reroute digital traffic around failed nodes. Worse Case Scenario: Be able to communicate
during/after nuclear attacks on multiple metropolitan areas
Users: Government offices and educational institutions
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The Origins of the Internet Initial Name: ARPANET First Node: UCLA 2nd & 3rd Nodes: UC Santa Barbara and University of
Utah Concept: the idea that there would be multiple
independent networks connected through an “Internetworking Architecture”.
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Timeline of the internet
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Challenges of building the Internet
Flexible and platform agnostic communication protocols did not exist
The internet would not be possible without a set of communication protocols called TCP/IP
TCP/IP was developed in 1972 by Robert Kahn and Vincent Cerf at Stanford Univ.
The basic premise of TCP/IP is to “join almost any networks together, no matter what their characteristics were/[are]”
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A Brief Summary of the Evolution of the Internet
1945 1995
Memex Conceived
1945
WWWCreated
1989
MosaicCreated
1993
A Mathematical
Theory of Communication
1948
Packet Switching Invented
1964
SiliconChip1958
First Vast ComputerNetwork
Envisioned1962
ARPANET1969
TCP/IPCreated
1972
InternetNamed
and Goes
TCP/IP1984
HypertextInvented
1965
Age ofeCommerce
Begins1995
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By January 2009The Internet Reached Two
Important Milestones:
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Internet Growth Trends
1977: 111 hosts on Internet 1981: 213 hosts 1983: 562 hosts 1984: 1,000 hosts 1986: 5,000 hosts 1987: 10,000 hosts 1989: 100,000 hosts 1992: 1,000,000 hosts 2001: 150 – 175 million hosts 2002: over 200 million hosts 2008 (July): over 500 million hosts By 2009 (January): over 600 million hosts By end of 2010, about 80% of the planet will be on the Internet
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100,000,000
200,000,000
300,000,000
400,000,000
500,000,000
600,000,000
700,000,000
Number of HostsAugust 1981 to January 2009
Internet HostsTop 10 Countries
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United States 316,000,000
Japan 39,909,000
Germany 22,606,000
Italy 17,702,000
China 14,306,000
France 14,256,000
Australia 11,134,000
Netherlands 10,983,000
Mexico 10,653,000
Brazil 9,573,000
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Statistics from the IITF Report The Emerging Digital Economy *
To get a market of 50 Million People Participating: Radio took 38 years TV took 13 years Once it was open to the General Public, The Internet
made to the 50 million person audience mark in just 4 years!!!
http://www.ecommerce.gov/emerging.htm Released on April 15, 1998
* Delivered to the President and the U.S. Public on April 15, 1998 by Bill Daley, Secretary of Commerce and Chairman of the Information Infrastructure Task Force
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Internet ApplicationsSurf and
Internet Chat and
Discussion ForumsSocial Networks
Download and Computer
Search Engines
E-CommerceTransfer
Protocol (FTP) and Telnet
Popular Uses of the
Internet
Popular Uses of the
Internet
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Challenges for the future
TCP/IP, the underlying protocol that enables the internet has flawsThere are multiple proposals to fix the flaws
Study Predicts Internet Users Face Bandwidth Drought by the end of 2010Infrastructure investmentsProjected traffic patterns
VideoPeer-to-peerMobile computing
Telecommunications and Networks
Business value of networksThe Internet
Network components
Chapter
6a
McGraw-Hill/Irwin Copyright © 2007 by The McGraw-Hill Companies, Inc. All rights reserved.
6-29
Network Concepts
NetworkAn interconnected chain, group or system
Number of possible connections on a network is N * (N-1)Where N = number of nodes (points of
connections on the network)Example, if there are 10 computers on a
network, there are 10 * 9 = 90 possible connections
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Metcalfe’s Law
The usefulness of a network equals the square of the number of users
On a small network, a change in technology affects technology only
On a large network like the Internet, a change in technology affects social, political and economic systems
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Telecommunications
TelecommunicationsExchange of information in any form (voice,
data, text, images, audio, video) over networks
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Trends in Telecommunications
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Open Systems
Information systems that use common standards for hardware, software, applications and networks
Internet networking technologies are a common standard for open systems
Connectivity: Ability of networked computers to easily access and
communicate with each other and share information Interoperability:
The ability of an open system to enable end user applications to be accomplished using different varieties of computer systems, software packages, and databases provided by a variety of interconnected networks
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Middleware
Any programming that serves to “glue together” two separate programs
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Digital Network Technologies
Rapid change from analog to digital network technologies
Analog: voice-oriented transmission, sound waves
Digital: discrete pulse transmissionDigital allows:
Higher transmission speedLarger amounts of informationGreater economyLower error ratesMultiple forms of communications on same
circuit
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Internet2
Next generation of the InternetHigh-performance networkIn use at 200 universities, scientific
institutions, communications corporations
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Business Value of Telecommunication Networks
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The Internet
Over 46 million servers (2004)710 – 945 million users (2004)No central computer systemNo governing bodyNo one owns it
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Internet Service Provider
ISPA company that specializes in providing easy
access to the InternetFor a monthly fee, you get software, user name,
password and accessISPs are connect to one another through
network access points
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Popular uses of the Internet
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Using the Internet for business
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Business value of the Internet
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An Intranet
A network inside an organizationThat uses Internet technologies (such as Web
browsers and servers, TCP/IP protocols, HTML, etc.)
To provide an Internet-like environment within the organization
For information sharing, communications, collaboration and support of business processes
Protected by security measures Can be accessed by authorized users through
the Internet
6-44
Enterprise Information Portal
6-45
Extranet
Network links that use Internet technologiesTo connect the Intranet of a businessWith the Intranets of its customers, suppliers or
other business partners
6-46
Extranet Uses