McGraw-Hill/Irwin Copyright © 2008 by The McGraw-Hill Companies, Inc. All rights reserved.

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THE INTERNET, THE WEB, AND ELECTRONIC COMMERCE

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The Internet and the Web• Large network that connects smaller networks

globally

• The Internet was Launched in 1969

– National computer network

– US funded project called ARPANET

• World Wide Web or WWW was introduced

in 1992 at CERN

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Common Internet Uses

Communicating Exchange e-mail

Discussion Groups

Online Shopping

Searching

– Virtual Libraries

Entertainment

Education or e-learning

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Internet Access Providers

• Common way to access the Internet

• Commercial Internet Service Providers (ISP)

– National Service Providers

– Regional Service Provider

– Wireless service

providers

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Browsers

Programs that provide access to Web resources

Allow you to surf the Internet

Three well-known browsers– Mozilla Firefox– Netscape Communications– Microsoft Internet Explorer

Address or location of the resource must be specified― URL

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URLs

Uniform Resource LocatorAll URLs have at least two parts

Protocol: rules for exchanging data between computers

Domain name: name of the server where the resource is locates

Locates Web sites

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More on Browsers

• Browsers interpret HTML commands

– Hypertext Markup Language

– Contained in a document

• Display document as a Web page

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Communication

• Most popular Internet activity

• Types of communication

– Electronic Mail (E-Mail)

• E-Mail Address

• Spam

– Instant Messaging

– Social Networking

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E-Mail

Transmission of electronic messages over the Internet

Basic partsHeader

Address

Subject

Attachment

Message

Signature Line:

additional information

About the sender.

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E-Mail Address Example

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Spam

• Junk and/or unwanted Email

• Computer viruses or destructive programs are often attached to unsolicited email

– CAN-SPAM Act

• Spam blockers incorporate a myriad of approached to identify and control spam

• Spam blockers are also referred to as:

– Junk mail filters

– Anti-spam programs

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Instant Messaging

• Is an extension of email that provides direct, live communication between two or more people

• Instant messaging programs also include: – Video conferencing features – File sharing – Remote assistance• Most widely used instant messaging services: – AOL’s Instant Messenger – Microsoft’s MSN Messenger – Yahoo Messenger

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Social Networking

• One of the fastest growing uses of the Internet

• Three basic categories:

– Reunite

– Friend of a friend

– Common interest

Social Networking

Reuniting: connect people who known one another but have lost touch (Facebook).

Friend of friend: bring together two people who don’t know one another but share a common friend.

Common interest: people who share common interest or hobbies.

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Search Tools

Search enginesMetasearch enginesSpecialized search engines

• Tips – Start with the right approach – Be as precise as possible – Use multiple words – Use Boolean operators – Check your spelling – Keep moving

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Search Engines

Specialized programs to assist in locating information

Types of searchesKeyword search

Directory search

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Metasearch Engines

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www.ixquick.comIxquickwww.dogpile.comDogpileSiteMetasearch

MetaCrawler www.metacrawler.com

Search www.search.com

Web Meta Search www.webmetasearch.com

Program that automatically submit your search request to several engines automatically, then receives the result, remove duplicates, order them and provide them to you

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Specialized Search Engines

www.medsite.comMedicine

www.lawcrawler.comLaw

www.historynet.comHistory

www.infomat.comFashion

www.eco-web.comEnvironment

SiteMetasearch Service

Focus on subject specific website

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Electronic Commerce

• Also known as e-commerce

• Buying and selling of goods over the Internet

– Business-to-consumer (B2C)

– Consumer-to-consumer (C2C)

• Web auctions

– Business-to-business (B2B)

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Business to Business

• Involves the sale of a product or service from one business to another (B2B)

• Primarily a manufacturer supplier relationship

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Business to Consumer

• Fastest growing type of e-commerce

• Three most widely used B2C applications:

– Online banking

– Financial trading

– Shopping

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Consumer to ConsumerWeb Auctions

• Consumer-to-consumer e-commerce (C2C)

• Similar to traditional auctions

• Types

– Auction house sites

– Person-to-person

auction sites

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Security

• Payment methods must be fast, reliable, and secure

• Three basic options– Checks– Credit card– Digital cash

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Web Utilities

• Specialized utility programs that make using the internet & web safer and easier

– Web-based applications

– FTP

– Plug-Ins

– Filters

– Internet Security Suites

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Plug-Ins

Acrobat Reader www.adobe.com

Media Player www.microsoft.com

QuickTime www.apple.com

RealPlayer www.real.com

Shockwave www.macromedia.com

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Internet Security Suites

• Collection of utility programs designed to maintain

your security and privacy while on the web

– McAfee

– Norton