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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
• 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
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)
• http://www.course.com
Hypertext transfer protocol
World Wide Web Domain category
Host Network Name
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
Internet Service Providers (ISPs)
• Provide Internet access to account holders• Monthly fee varies • Some are free
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
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
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
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
• E-mail• 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
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