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

Principles of Information Systems, Sixth Edition 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, including alternatives for connecting to it and the role of Internet service providers. –Identify and briefly describe the services associated with the Internet.

Principles of Information Systems, Sixth Edition 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. –Explain the use of Web browsers, search engines, and other Web tools.

Principles of Information Systems, Sixth Edition 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 a process for creating Web content. –Describe Java and 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.

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

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

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

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

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

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

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

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)

Principles of Information Systems, Sixth Edition Accessing the Internet

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

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

Principles of Information Systems, Sixth Edition Internet Services

Principles of Information Systems, Sixth Edition Internet Services

Principles of Information Systems, Sixth Edition Internet Services

Principles of Information Systems, Sixth Edition and Instant Messaging

Principles of Information Systems, Sixth Edition ICQ

Principles of Information Systems, Sixth Edition Usenet Newsgroups

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

Principles of Information Systems, Sixth Edition Other Internet Services

Principles of Information Systems, Sixth Edition The World Wide Web

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

Principles of Information Systems, Sixth Edition Interesting Web Sites

Principles of Information Systems, Sixth Edition Hypertext Markup Language

Principles of Information Systems, Sixth Edition Google

Principles of Information Systems, Sixth Edition Popular Search Engines

Principles of Information Systems, Sixth Edition Java

Principles of Information Systems, Sixth Edition Java

Principles of Information Systems, Sixth Edition CVS.com

Principles of Information Systems, Sixth Edition Intranets and Extranets

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

Principles of Information Systems, Sixth Edition Intranet

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.

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

Principles of Information Systems, Sixth Edition Virtual Private Network

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

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

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

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

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

Principles of Information Systems, Sixth Edition Cryptography

Principles of Information Systems, Sixth Edition FedCIRC

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

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