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

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

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

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

3 Principles of Information Systems, Sixth Edition 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

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

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

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

7 Principles of Information Systems, Sixth Edition Uniform Resource Locator (URL) Hypertext transfer protocol World Wide WebDomain category Host Network Name

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

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

10 Principles of Information Systems, Sixth Edition Accessing the Internet

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

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

13 Principles of Information Systems, Sixth Edition Internet Services

14 Principles of Information Systems, Sixth Edition Internet Services

15 Principles of Information Systems, Sixth Edition Internet Services

16 Principles of Information Systems, Sixth Edition and Instant Messaging

17 Principles of Information Systems, Sixth Edition ICQ

18 Principles of Information Systems, Sixth Edition Usenet Newsgroups

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

20 Principles of Information Systems, Sixth Edition Other Internet Services

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

22 Principles of Information Systems, Sixth Edition 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

23 Principles of Information Systems, Sixth Edition Interesting Web Sites

24 Principles of Information Systems, Sixth Edition Hypertext Markup Language

25 Principles of Information Systems, Sixth Edition Google

26 Principles of Information Systems, Sixth Edition Popular Search Engines

27 Principles of Information Systems, Sixth Edition Java

28 Principles of Information Systems, Sixth Edition Java

29 Principles of Information Systems, Sixth Edition CVS.com

30 Principles of Information Systems, Sixth Edition Intranets and Extranets

31 Principles of Information Systems, Sixth Edition 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

32 Principles of Information Systems, Sixth Edition Intranet

33 Principles of Information Systems, Sixth Edition Extranet A network that links selected resources of the intranet of a company with its customers, suppliers, or other business partners.

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

35 Principles of Information Systems, Sixth Edition Virtual Private Network

36 Principles of Information Systems, Sixth Edition 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

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

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

39 Principles of Information Systems, Sixth Edition Net Issues Management issues Service and speed issues –Routers can become bottlenecks –Connection agreements

40 Principles of Information Systems, Sixth Edition Net Issues Privacy –Cookie: text file placed on the hard disk of a computer system Fraud Security with encryption and firewalls –Digital signature –Cyphertext –Cryptography Unauthorized sites

41 Principles of Information Systems, Sixth Edition Cryptography

42 Principles of Information Systems, Sixth Edition FedCIRC

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

44 Principles of Information Systems, Sixth Edition Summary Internet - started with ARPANET, a project started by the U.S. Department of Defense (DOD) Internet services include: – –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


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