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Chapter 2 The Internet and World Wide Web Just remember… It took 38 years for radio to reach 50 million users 13 years for television to reach 50 million users Less than 4 years for the Web to do the same! By 2010, about 80% of the planet will be on the Internet The Internet Next

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Chapter 2 the internet and world wide web l.jpg

Chapter 2The Internet and World Wide Web


Just remember l.jpg
Just remember…

  • It took

  • 38 years for radio to reach 50 million users

  • 13 years for television to reach 50 million users

  • Less than 4 years for the Web to do the same!

  • By 2010, about 80% of the planet will be on the Internet


The internet l.jpg
The Internet

Next

  • What are some services found on the Internet?

p. 68-69 Fig. 2-1


History of the internet l.jpg
History of the Internet

ARPANET

Networking project by Pentagon’s Advanced Research Projects Agency (ARPA)

Goal:To allow scientists at different locations to share information

Goal:To function if part of network were disabled

Became functional September 1969

Next

  • How did the Internet originate?

p. 69


Arpanet l.jpg
ARPANET

  • Started as WAN with 4 main computers

    • University of California at Los Angeles

    • Stanford Research Institute

    • University of California at Santa Barbara

    • University of Utah

  • By 1984 ARPANET = 1,000 nodes (hosts)

  • Today more than 350 million nodes/hosts connect to Net

September 1969


Arpanet6 l.jpg
ARPANET

September 1971


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History of the Internet

Today

More than 350 million host nodes

1984

More than 1,000 host nodes

1969

Four host nodes

Next

  • How has the Internet grown?

p. 69


How the internet works l.jpg
How The Internet Works

Regional ISP

Step 3

Step 5

Step 1

Step 2

Step 4

National ISP

Step 6

Local ISP

Internet backbone

Step 8

Step 7

National ISP

Backbone Maps

http://www.nthelp.com/maps.htm


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History of the Internet

  • Internet2 (I2)

    • Internet-related research and development project

    • Develops and tests advanced Internet technologies

World Wide Web Consortium (W3C)

  • Oversees research, sets standards and guidelines

  • Tim Berners-Lee, director

Next

  • Who controls the Internet?

  • No onec—cit is a public, cooperative, andindependent network

  • Several organizations set standards

p. 70


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How the Internet Works

Next

  • How can you connect to the Internet?

Slow-speed technology

High-speed connection

Dial-up accessmodem in your computer uses a standard telephone line to connect to the Internet

Digital subscriber line (DSL),cable telephone Internet services (CATV), cable modem,fixed wireless, and satellite modems

Connection must be established each time you log on. Slow but inexpensive

Connection is always on—whenever the computer is running

p. 70


How the internet works11 l.jpg
How the Internet Works

Next

  • What are ways to access the Internet?

  • ISP, Regional or National

  • OSP (AOL and MSN, for example)

  • Wireless Internet Service Provider

p. 71 – 72 Fig. 2-2


How the internet works12 l.jpg
How the Internet Works

Next

  • What is a domain name?

  • Text version ofInternet Protocol (IP) address

  • Number that uniquely identifies each computer or device connected to Internet

p. 73 - 74 Figs. 2-4 – 2-5


The world wide web l.jpg
The World Wide Web

A worldwide collection of electronic documents

Also called the Web

Each electronic document is called a Web page

Can contain text, graphics, sound, video, and built-in connections

A Web site is a collection of related Web pages

Next

  • What is the World Wide Web (WWW)?

p. 75


The world wide web14 l.jpg
The World Wide Web

MicrosoftInternetExplorer

Netscape

Mozilla

Firefox

Opera

Safari

Next

  • What is a Web browser?

  • Program that allows you to view Web pages

p. 75


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The World Wide Web

Next

  • What is a home page?

  • The first page that a Web site presents

  • Often provides connections to other Web pages

p. 76 Fig.2-1a


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The World Wide Web

Next

  • How do handheld computers and cellular telephones access the Web?

  • Use a microbrowser that displays Web pages that contain mostly text

  • Must be Internet-enabled

p. 76 Fig. 2-7


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The World Wide Web

Next

  • What is downloading?

  • The process of a computer receiving information

  • Depending upon connection speed, downloading can take from a few seconds to several minutes

p. 76


The world wide web18 l.jpg
The World Wide Web

Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation,

then click Web Addresses below Chapter 2

Next

  • What is a URL?

Unique address for a Web page

A web server delivers the Web page to your computer

p. 76 Fig. 2-8


The world wide web19 l.jpg
The World Wide Web

Next

  • What is a link?

  • Built-in connection to another related Web page location

  • Item found elsewhere on same Web page

  • Different Web page at same Web site

  • Web page at a different Web site

p. 77


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The World Wide Web

Next

  • How can you recognize links?

  • Pointer changes to a small handwhen you point toa link

  • A link can be text or an image

  • Text links areusually underlinedand in a differentcolor

p. 77 Fig. 2-9


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The World Wide Web

Next

  • What is a subject directory?

  • Search tool with organized set of topics and subtopics

  • Lets you find information by clicking links rather than entering keywords

p. 78 – 79 Fig. 2-11


The world wide web22 l.jpg
The World Wide Web

Next

  • What is a search engine?

  • Program used to find Web sites and Web pages by entering words or phrases called search text

  • Also called a keyword

p. 78 – 80 Fig. 2-10


The world wide web23 l.jpg
The World Wide Web

Step 2.Select type of search you wantto run

Step 1.Go to search engine

Step 3.View hits

Step 4.Click link to view Web site

Next

  • What is a hit?

  • Any Web site name that is listed as the result of a search

p. 80 Fig. 2-12


The world wide web24 l.jpg
The World Wide Web

  • Portal

  • News

  • Informational

  • Business/Marketing

  • Educational

  • Entertainment

  • Advocacy

  • Blog

  • Wiki

  • Content Aggregator

  • Personal

Next

  • What are the eleven basic types of Web sites?

p. 82 – 84 Fig. 2-14


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The World Wide Web

Next

  • What is a portal?

  • A Web site that offers a variety of services from one, convenient location, usually for free

  • Searching, sports, e-mail, news, weather, auctions, Web communities(Web sites that join people with similar interests)

p. 82 Fig. 2-14a


The world wide web26 l.jpg
The World Wide Web

Next

  • What is a wiki?

  • Collaborative Web site that allows users to add to, modify, or delete the Web site content via their Web browser

p. 84 Fig. 2-14i


The world wide web27 l.jpg
The World Wide Web

Next

  • What is a content aggregator?

  • Business that gathers and organizes Web content and then distributes, or feeds, the content to subscribers for free or a fee

p. 84 Fig. 2-14j


The world wide web28 l.jpg
The World Wide Web

Next

  • What are the guidelines for evaluating the value of a Web site?

Affiliation

Audience

Authority

Content

Currency

Design

Objectivity

p. 84 Fig. 2-15


The world wide web29 l.jpg
The World Wide Web

Next

  • What is multimedia?

  • Application integrating text with other media elements

  • Graphics

  • Animation

  • Audio

  • Video

  • Virtual reality

  • Plug-Ins

p. 85 Fig. 2-16


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The World Wide Web

Next

  • What graphics formats are used on the Web?

BMP

JPEG(pronounced JAY-peg)

PNG(pronounced ping)

TIFF

GIF(pronounced JIFF)

p. 85 Fig. 2-17


The world wide web31 l.jpg
The World Wide Web

Next

  • What is a thumbnail?

  • Small version of a larger graphicc—used to improve Web page display time

  • Usually click on thumbnail to display larger graphic

p. 86 Fig. 2-18


The world wide web32 l.jpg
The World Wide Web

Next

  • What is animation?

  • Appearance of motion created bydisplaying a series of still imagesin sequence

p. 86


The world wide web33 l.jpg
The World Wide Web

Next

  • What is audio?

  • Music, speech, or any other sound

  • Individual compressed sound files that you download from the Web to your computer

  • Common Web audio file formats are AA, AAC, AIFF, ASF, MP3, WAV, WMA, RA, and QT

  • Once downloaded, you can play (listen to) the contents of the files

  • p. 86 Fig. 2-20


    The world wide web34 l.jpg
    The World Wide Web

    Next

    • What is video?

    • Consists of full-motion images that areplayed back at various speeds

    • MPEG (Moving Pictures Experts Group)is popular video compressionstandard

    p. 88 Fig. 2-21


    The world wide web35 l.jpg
    The World Wide Web

    Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation,

    then click Streaming Media below Chapter 2

    Next

    • What is streaming audio/video?

    The process oftransferring audio/videoin a continuousand even flow

    Enables you tolisten to music or watcha video as it downloadsto your computer

    p. 86


    The world wide web36 l.jpg
    The World Wide Web

    Next

    • What is virtual reality (VR)?

    • Use of computers to simulate real or imagined environment

    • Appears as a three dimensional (3-D) space

      • Used for games and many practical applications

    p. 88 Fig. 2-22


    The world wide web37 l.jpg
    The World Wide Web

    Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation,

    then click Plug-Ins below Chapter 2

    Next

    • What are plug-ins?

    • Programs that extend the capability of a browser

    • You can download many plug-ins at nocost from variousWeb sites

    p. 89 Fig. 2-23


    Web publishing l.jpg
    Web Publishing

    Step 2.Analyze and design the Web site

    Step 1.Plan the Web site

    Step 3.Create the Web site

    Step 5.Maintain the Web site

    Step 4.Deploy the Web site

    Next

    • What is Web publishing?

    • Development and maintenance of Web pages

    p. 89 Fig. 2-24


    E commerce l.jpg
    E-Commerce

    Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation,

    then click E-Commerce below Chapter 2

    Next

    • What is E-commerce?

    • Short for electronic commerce

    • Business transaction that occurs over the Internet

    Business to consumer (B2C)Sale of goods to general public

    Consumer to consumer (C2C)One consumer sells directly to another

    Business to business (B2B)Business providing goods andservices to other businesses

    p. 91 Fig. 2-25


    Other internet services l.jpg
    Other Internet Services

    Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation,

    then click E-Mail below Chapter 2

    Next

    • What is E-mail?

    • Short for electronic mail

    • The transmission of messages and files via a computer network

      • Messages can consist of simple text or can contain attachments, such as documents, graphics, or audio/video clips

      • Internet access providers usually provide an e-mail program

      • Some Web sites—such as MSN Hotmail and Yahoo!—provide free e-mail services

    • One of the original services on the Internet

    p. 92 - 94


    Other internet services41 l.jpg
    Other Internet Services

    Next

    • What is an e-mail address?

    • Unique name that consists of a user name and domain name that identifies the user

    p. 94 Fig. 2-27


    E mail tidbits l.jpg
    E-mail “Tidbits”

    • Attachments / Viruses

    • Anonymous e-mail

    • SPAM

    • Hoaxes / Urban Legends

    • How long does e-mail last?

      • Example?


    Other internet services43 l.jpg
    Other Internet Services

    Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation,

    then click FTP below Chapter 2

    Next

    • What is FTP?

    • File Transfer Protocol—Internet standard that allows you to upload and download files with other computers on the Internet

    p. 96 Fig. 2-29


    Other internet services44 l.jpg
    Other Internet Services

    Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation,

    then click Newsgroups and Message Boards below Chapter 2

    Next

    • What are newsgroupsandmessage boards?

    • Newsgroup

    • Online area where users discuss a particular subject

    • Message board

    • Type of discussion group

    • Many Web sites use message boards because they are easier to use

    p. 96 - 97 Fig. 2-30


    Other internet services45 l.jpg
    Other Internet Services

    Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation,

    then click Mailing Listsbelow Chapter 2

    Next

    • What is a mailing list?

    • Group of e-mail addresses given a single name

    • When a message is sent to the mailing list, everyone on the list receives the message

    • To add your name to a mailing list you must subscribe to it; to remove your name you must unsubscribe

    p. 97 Fig. 2-31


    Other internet services46 l.jpg
    Other Internet Services

    Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation,

    then click Chat Roomsbelow Chapter 2

    Next

    • What is a chat?

    • Real-time typed conversation that takes place on a computer

    • Chat room is location on server that permits users to discuss topics of interest

    p. 98 Fig. 2-32


    Other internet services47 l.jpg
    Other Internet Services

    Step 2.The server determines if any of your established friends, family, or coworkers, called buddies, are online

    Step 1.Login to the IM server

    Step 5.Your buddy replies

    Step 3.You send instant messages to an online buddy

    Step 4.Your Instant Message travels through a messaging server and then to the online buddy

    Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation,

    then click Instant Messagingbelow Chapter 2

    Next

    • What is instant messaging (IM)?

    • A real-time Internet communications service that notifies you when one or more people are online and allows you to exchange messages or files

    p. 98 Fig. 2-33


    Other internet services48 l.jpg
    Other Internet Services

    Next

    • What is internet telephony?

    • Enables users to speak to other users over the Internet using their computer

    p. 99 - 100 Fig. 2-34


    Netiquette l.jpg
    Netiquette

    Next

    • What is netiquette?

    • Code of acceptable behaviors users should follow while on the Internet

    Golden Rule: Treat others as you would like them to treat you.

    p. 100


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