© Paradigm Publishing Inc. 7-1 Chapter 7 The Internet and the World Wide Web

© Paradigm Publishing Inc. 7-1

Chapter 7The Internet and the World Wide Web


Presentation Overview

• The Internet: A Global Network

• Connecting to the Internet

• Navigating the Internet

• Viewing Web Pages

• Searching for Information on the Internet

• Using Newer Internet Applications

• Respecting the Internet Community


The Internet: A Global Network

How does the Internet create a global community?



How does the Internet create a global community?Internet can be used for– communications



How does the Internet create a global community?Internet can be used for– communications– entertainment



How does the Internet create a global community?Internet can be used for– communications– entertainment– e-commerce



How does the Internet create a global community?Internet can be used for– communications– entertainment– e-commerce– research



How does the Internet create a global community?Internet can be used for– communications– entertainment– e-commerce– research– distance learning


The Internet: A Global NetworkElectronic Mail allows users to create, send, receive, save, and forward messages in electronic form.



Communications



Communications– Chat rooms – allow users to engage in real-time

dialogue




dialogue– Instant messaging – allows conversations

between two people to take place in real time





between two people to take place in real time– Blogs – frequently updated journals contain entries

of personal thoughts and Web links





between two people to take place in real time– Blogs – frequently updated journals contain entries

of personal thoughts and Web links– Mailing lists – lists of addresses of people

interested in a topic



Communications



Communications– Message boards – lists of messages that anyone with

access to the board can read




access to the board can read– Newsgroups – collections of posted articles organized

by subject





by subject– Telecommuting – workers can work at home using

a computer, modem, and telephone line





by subject– Telecommuting – workers can work at home using

a computer, modem, and telephone line– File Transfer Protocol – allows users to transfer files

to and from remote computer systems



Comparison of e-mail, cell phone, and IM usage in the United States



Entertainment



Entertainment– Online games – many free games are available

online




online– Online gambling – users can gamble in virtual

casinos online





casinos online– Music – users can download and play music on

computers





casinos online– Music – users can download and play music on

computers– Videos – television shows, music videos, and movies

can be downloaded and viewed on computers



Electronic commerceallows users to exchange business information, products, services, and payments online

Retail Sales: Total and Online in 2005



Researchallows access to books, periodicals, photos, videos, and sound files from around the world to be read online or downloaded for later use



Distance Learningallows electronic transfer of information and course materials between learning institutions and students


Connecting to the Internet

What resources are needed to connect to the Internet?



What resources are needed to connect to the Internet?– computer, personal digital assistant (PDA), or smartphone



What resources are needed to connect to the Internet?– computer, personal digital assistant (PDA), or smartphone– network card or modem



What resources are needed to connect to the Internet?– computer, personal digital assistant (PDA), or smartphone– network card or modem– network, telephone line, or cable connection



What resources are needed to connect to the Internet?– computer, personal digital assistant (PDA), or smartphone– network card or modem– network, telephone line, or cable connection– account with an Internet service provider (ISP) or value added network (VAN)



Types of Internet Connections




– Dial-up access allows access over a standard telephone line.





– Local area network (LAN) connection provides a direct wire at speeds 20 times faster than dial up.






– Cable modem allows simultaneous television viewing and Internet usage.






– Cable modem allows simultaneous television viewing and Internet usage.

– Digital subscriber line (DSL) allows simultaneous telephone and Internet usage.







– Wireless allows radio-wave connections to the Internet in public places.




– Wireless allows radio-wave connections to the Internet in public places.

– Satellite requires a satellite dish and a modem for Internet connection.



Comparison of Internet connection speeds


Navigating the Internet

What capabilities do Web browsers offer?




– automatic identification and connection to a local port providing Internet connection





– POP3 mail service for reading and sending e-mail





– POP3 mail service for reading and sending e-mail– HTML code viewing





– POP3 mail service for reading and sending e-mail– HTML code viewing– Java applet support





– POP3 mail service for reading and sending e-mail– HTML code viewing– Java applet support– easy-to-use interfaces that allow for control

commands



Internet Protocol Addresses

four-group series of numbers separated by periods that allow browsers to locate material on the Internet



Universal Resource Locators (URL)pathname describing where information can be found on Internet

• communication protocol is first part (HTTP)• format information follows protocol (WWW)• domain name identifies organization• domain suffix identifies type of organization



Common domain suffixes used in URLs



Country name abbreviations in URLs


Navigating the InternetThe Path of a URL

URL directs routers and servers to display a specific Web page



Packets

software breaks each file into packets and sends them over separate routes


Viewing Web Pages

– Web page – single document viewable on the World Wide Web


Viewing Web Pages


– Web site – includes all Web pages making up site


Viewing Web Pages


– Web site – includes all Web pages making up site– Home page – overview of information and features

contained within a Web site


Viewing Web Pages


– Web site – includes all Web pages making up site– Home page – overview of information and features

contained within a Web site– Portal – site that acts as gateway to access a variety of

information


Viewing Web PagesHypertext Markup Language (HTML)set of specifications describing characteristics of elements that appear on a Web page


Viewing Web Pages

Extensible Markup Language (XML)


Viewing Web Pages


– organizes and standardizes data so computers can communicate with each other


Viewing Web Pages


– organizes and standardizes data so computers can communicate with each other

– allows developers to design their own languages that work with limitless types of documents and file formats


Viewing Web Pages

Audio, Video, and Animation Elements


Viewing Web Pages


– Java applets provide the ability to program online games and highly interactive interfaces.


Viewing Web Pages



– Cookies store preference information, such as user ID and passwords.


Viewing Web Pages



– Cookies store preference information, such as user ID and passwords.

– Plug-ins extend the capabilities of Web browsers by improving graphic, sound, and video elements.


Viewing Web Pages

Ways Companies Advertise on the Internet


Viewing Web Pages

Ways Companies Advertise on the Internet– Banner – graphic that invites viewers to click it to

be directed to a Web site


Viewing Web Pages


be directed to a Web site– Pop-Up window – banner that “pops” unexpectedly

onto the screen


Viewing Web Pages


be directed to a Web site– Pop-Up window – banner that “pops” unexpectedly

onto the screen– Blind link – link with misleading information that

actually directs viewers to an advertising Web page


Viewing Web Pages

Ways Companies Advertise on the Internet– Banner – graphic that invites viewers to click it to be

directed to a Web site– Pop-Up window – banner that “pops” unexpectedly

onto the screen– Blind link – link with misleading information that

actually directs viewers to an advertising Web page– Hi-jacker – causes your efforts to reach a certain

page to be redirected to another page


Viewing Web Pages

Webrings

link sites devoted to a similar theme or topic, forming a ring


Searching for Information on the InternetUsers can search for and retrieve information from Web pages by using a search engine.


Searching for Information on the Internet

Differences between search engines are related to:



Differences between search engines are related to:– number of Web pages the engine catalogs



Differences between search engines are related to:– number of Web pages the engine catalogs– search methodology used



Differences between search engines are related to:– number of Web pages the engine catalogs– search methodology used– number of search tools available to refine searches



Differences between search engines are related to:– number of Web pages the engine catalogs– search methodology used– number of search tools available to refine searches– whether the engine accepts fees from Web site

owners to place their names at the top of search results list



Search Techniques



Search Techniques– Keywords are search terms that allow a search

engine search for specific information



Search Techniques– Keywords are search terms that allow a search

engine to search for specific information– Search operators link keywords with terms

such as:– AND (combines keywords)– OR (returns references with any of the keywords)– NOT (excludes a keyword)


Using Newer Internet ApplicationsPeer-to-Peer (P2P) File Sharing

allows people to download material directly from other users’ hard drives


Using Newer Internet Applications

Internet Telephony



Internet Telephony– allows two or more people with good connections

to use the Internet to make telephone-style calls around the world





– digitizes voices and breaks them down into packets to send anywhere





– digitizes voices and breaks them down into packets to send anywhere

– can be sent computer to computer, to Internet-ready phones, and to analog telephone adapters



Streaming Audio and Video



Streaming Audio and Video– Streaming (webcasting) sends a continuous stream

of data to a computer where it is immediately played as audio or video



Streaming Audio and Video– Streaming (webcasting) sends a continuous stream

of data to a computer where it is immediately played as audio or video

– Protects copyrighted material because a complete copy is not downloaded and cannot be copied and shared



Webcams

tiny cameras allow live video transmission over the Web

Audio Mailallows people to transmit messages by voice


Respecting the Internet Community

What are safeguards for good Internet behavior?



What are safeguards for good Internet behavior?– Netiquette – guidelines for good behavior



What are safeguards for good Internet behavior?– Netiquette – guidelines for good behavior– Moderated environments – a moderator can filter messages and ban people from a chat room



What are safeguards for good Internet behavior?– Netiquette – guidelines for good behavior– Moderated environments – a moderator can filter messages and ban people from a chat room– Net neutrality – states that all net traffic shall be treated with equal priority



What are safeguards for good Internet behavior?– Netiquette – guidelines for good behavior– Moderated environments – a moderator can filter messages and ban people from a chat room– Net neutrality – states that all net traffic shall be treated with equal priority– Digital Millennium Copyright Act of 1998 – protects copyrighted material



Core rules of netiquette



What are some points to remember when sending e-mail messages?



What are some points to remember when sending e-mail messages?– Once sent, they cannot be retrieved.



What are some points to remember when sending e-mail messages?– Once sent, they cannot be retrieved.– A permanent copy of the e-mail remains somewhere on the Internet.



What are some points to remember when sending e-mail messages?– Once sent, they cannot be retrieved.– A permanent copy of the e-mail remains somewhere on the Internet.– E-mail is easily forwarded or copied.



Digital Millennium Copyright Act of 1998



Digital Millennium Copyright Act of 1998– prohibits people from defeating software encryption programs and other safeguards placed on copyrighted material



Digital Millennium Copyright Act of 1998– prohibits people from defeating software encryption programs and other safeguards placed on copyrighted material– makes the use and distribution of security- cracking codes illegal


On the Horizon

Based on the information presented in this chapter and your own experience, what do you think is on the horizon?

Documents

© Paradigm Publishing Inc. 7-1 Chapter 7 The Internet and the World Wide Web