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Principles of Information Systems, Sixth Edition 1 The Internet, Intranets, and Extranets Chapter 7.

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Presentation on theme: "Principles of Information Systems, Sixth Edition 1 The Internet, Intranets, and Extranets Chapter 7."— Presentation transcript:

1 Principles of Information Systems, Sixth Edition 1 The Internet, Intranets, and Extranets Chapter 7

2 Principles of Information Systems, Sixth Edition 2 Chapter 7 Outline Use and Function of the Internet Internet servces The Worldwide Web Intranets and Extranets Net Issues

3 Principles of Information Systems, Sixth Edition 3 Use and Functioning of the Internet

4 Principles of Information Systems, Sixth Edition 4 Use and Functioning of the Internet ARPANET Internet Protocol (IP) Wireless Internet Research for a faster Internet –Internet2 (I2) –Next Generation Internet (NGI) –Corporate efforts

5 Principles of Information Systems, Sixth Edition 5 Routing Messages Over the Internet

6 Principles of Information Systems, Sixth Edition 6 U.S. Internet Usage

7 Principles of Information Systems, Sixth Edition 7 How the Internet Works Hosts Routers forward packets to other networks Internet Protocol Stack (TCP/IP) –Internet Protocol (IP) –Transport Control Protocol (TCP) Backbones

8 Principles of Information Systems, Sixth Edition 8 Uniform Resource Locator (URL) http://www.course.com/index.htmlhttp://www.course.com Hypertext transfer protocol Domain name(Default) File Name Note: 1. The fourth component is the “Path” which is not shown here. 2. http:// is the default protocol

9 Principles of Information Systems, Sixth Edition 9 U.S. Top Level Domain Affiliations

10 Principles of Information Systems, Sixth Edition 10 Accessing the Internet Connection via a LAN server –Network adapter card –Open Datalink Interface (ODI) –Network Driver Interface Specification (NDIS)

11 Principles of Information Systems, Sixth Edition 11 Accessing the Internet

12 Principles of Information Systems, Sixth Edition 12 Internet Service Providers (ISPs) Provide Internet access to account holders Monthly fee varies Some are free

13 Principles of Information Systems, Sixth Edition 13 Internet Service Providers (ISPs)

14 Principles of Information Systems, Sixth Edition 14 Internet Services

15 Principles of Information Systems, Sixth Edition 15 Internet Services

16 Principles of Information Systems, Sixth Edition 16 Internet Services

17 Principles of Information Systems, Sixth Edition 17 E-mail and Instant Messaging

18 Principles of Information Systems, Sixth Edition 18 ICQ

19 Principles of Information Systems, Sixth Edition 19 Usenet Newsgroups

20 Principles of Information Systems, Sixth Edition 20 Internet Phone and Videoconferencing Services

21 Principles of Information Systems, Sixth Edition 21 Other Internet Services

22 Principles of Information Systems, Sixth Edition 22 The World Wide Web

23 Principles of Information Systems, Sixth Edition 23 The World Wide Web Menu-based system that uses client/server model Hypermedia HTML, XML Web browsers Java Search engines –Keyword indexes: fast & broad –Subject indexes: focused searches

24 Principles of Information Systems, Sixth Edition 24 Some Interesting Web Sites

25 Principles of Information Systems, Sixth Edition 25 Hypertext Markup Language

26 Principles of Information Systems, Sixth Edition 26 Google

27 Principles of Information Systems, Sixth Edition 27 Popular Search Engines

28 Principles of Information Systems, Sixth Edition 28 Java

29 Principles of Information Systems, Sixth Edition 29 Java

30 Principles of Information Systems, Sixth Edition 30 CVS.com

31 Principles of Information Systems, Sixth Edition 31 Intranets and Extranets

32 Principles of Information Systems, Sixth Edition 32 Intranet Internal corporate network built using Internet and World Wide Web standards and products Slashes the need for paper Provides employees with an easy and intuitive approach to access information that was previously difficult to obtain Only accessible inside an organization.

33 Principles of Information Systems, Sixth Edition 33 Intranet

34 Principles of Information Systems, Sixth Edition 34 Extranet A network that links selected resources of the intranet of a company with its customers, suppliers, or other business partners. Access is often controlled by using a password and VPN (see slide 36).

35 Principles of Information Systems, Sixth Edition 35 Internet, Intranet, and Extranet Users

36 Principles of Information Systems, Sixth Edition 36 Virtual Private Network

37 Principles of Information Systems, Sixth Edition 37 Developing Web Content Computer must be linked to a Web server Need Web browser program Add links to home page Advertise Tools –Word processors –HTML editor –HTML template –Text editor

38 Principles of Information Systems, Sixth Edition 38 Push Technology Used to send information automatically over the Internet Relies on HTTP or Java technology Drawbacks include: –Information overload –Volume of data broadcast

39 Principles of Information Systems, Sixth Edition 39 Business Uses of the Web E-mail Linking buyers and sellers Tool for marketing, sales, and customer support Low-cost alternative to fax or express mail

40 Principles of Information Systems, Sixth Edition 40 Net Issues Management issues Service and speed issues –Routers can become bottlenecks –Connection agreements Privacy –Cookie: text file placed on the hard disk of a computer system Fraud Security with encryption and firewalls –Digital signatures, Cyphertext, Cryptography Unauthorized sites

41 Principles of Information Systems, Sixth Edition 41 Cryptography

42 Principles of Information Systems, Sixth Edition 42 FedCIRC

43 Principles of Information Systems, Sixth Edition 43 The Web in Three Dimensions

44 Principles of Information Systems, Sixth Edition 44 Summary Internet - started with ARPANET, a project started by the U.S. Department of Defense (DOD) Internet services include: –E-mail –Telnet –FTP –Usenet and newsgroups –Chat rooms Web site - like a magazine, with a cover page called a home page that has graphics, titles, black and highlighted text

45 Principles of Information Systems, Sixth Edition 45 Principles and Learning Objectives The Internet is like many other technologies – it provides a wide range of services, some of which are effective and practical for use today, others are still evolving, and still others will fade away from lack of use. –BRIEFLY DESCRIBE HOW THE INTERNET WORKS, DIFFERENT WAYS TO CONNECT TO IT AND THE ROLE OF INTERNET SERVICE PROVIDERS. –IDENTIFY & DESCRIBE THE SERVICES ASSOCIATED W/ THE INTERNET.

46 Principles of Information Systems, Sixth Edition 46 Principles and Learning Objectives Originally developed as a document- management system, the World Wide Web is a menu-based system that is easy to use for personal and business applications. –DESCRIBE THE WORLD WIDE WEB AND HOW IT WORKS INCLUDING THE USE OF WEB BROWSERS, SEARCH ENGINES, AND OTHER WEB TOOLS.

47 Principles of Information Systems, Sixth Edition 47 Principles and Learning Objectives Before the Internet and the World Wide Web become universally used and accepted for business use, management issues; service and speed issues; and fraud, security and unauthorized Internet sites must be addressed and solved. –IDENTIFY WHO IS USING THE WEB TO CONDUCT BUSINESS AND DISCUSS SOME OF THE PROS AND CONS OF WEB SHOPPING. –OUTLINE THE PROCESS FOR CREATING WEB CONTENT. –DESCRIBE JAVA. DISCUSS ITS POTENTIAL IMPACT ON THE SOFTWARE WORLD. –DEFINE THE TERMS INTRANET AND EXTRANET AND DISCUSS HOW ORGANIZATIONS ARE USING THEM. –IDENTIFY SEVERAL ISSUES ASSOCIATED WITH THE USE OF NETWORKS.

48 Principles of Information Systems, Sixth Edition 48 End of Chapter 7


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