The Internet Intranets and Extranets Chapter 7 MSIS

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 – Internet 2 (I 2) – 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 World Wide Web Hypertext transfer protocol Domain category Host Network Name 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

Fed. CIRC 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