The Internet, Intranets, and Extranets Chapter 7

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Transcription:

The Internet, Intranets, and Extranets Chapter 7 MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 1

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. MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 2

Principles and Learning Objectives Originally developed as a documentmanagement 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. MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 3

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. MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 4

Use and Functioning of the Internet MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 5

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 MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 6

Routing Messages Over the Internet MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 7

U.S. Internet Usage MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 8

How the Internet Works Hosts Routers forward packets to other networks Internet Protocol Stack (TCP/IP) Internet Protocol (IP) Transport Control Protocol (TCP) Backbones MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 9

Uniform Resource Locator (URL) http://www.course.com Hypertext transfer protocol World Wide Web Host Network Name Domain category MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 10

U.S. Top Level Domain Affiliations MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 11

Accessing the Internet Connection via a LAN server Network adapter card Open Datalink Interface (ODI) Network Driver Interface Specification (NDIS) MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 12

Accessing the Internet MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 13

Internet Service Providers (ISPs) Provide Internet access to account holders Monthly fee varies Some are free MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 14

Internet Service Providers (ISPs) MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 15

Internet Services MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 16

Internet Services MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 17

Internet Services MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 18

E-mail and Instant Messaging MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 19

ICQ MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 20

Usenet Newsgroups MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 21

Internet Phone and Videoconferencing Services MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 22

Other Internet Services MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 23

The World Wide Web MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 24

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 MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 25

Interesting Web Sites MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 26

Hypertext Markup Language MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 27

Google MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 28

Popular Search Engines MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 29

Java MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 30

Java MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 31

CVS.com MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 32

Intranets and Extranets MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 33

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 MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 34

Intranet MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 35

Extranet A network that links selected resources of the intranet of a company with its customers, suppliers, or other business partners. MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 36

Internet, Intranet, and Extranet Users MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 37

Virtual Private Network MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 38

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 MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 39

Push Technology Used to send information automatically over the Internet Relies on HTTP or Java technology Drawbacks include: Information overload Volume of data broadcast MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 40

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 MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 41

Net Issues Management issues Service and speed issues Routers can become bottlenecks Connection agreements MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 42

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 MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 43

Cryptography MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 44

FedCIRC MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 45

The Web in Three Dimensions MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 46

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 MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan 47

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