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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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just remember
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
The Internet

Next

What are some services found on the Internet?

p. 68-69 Fig. 2-1

history of the internet
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

history of the internet5
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

arpanet
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

arpanet7
ARPANET

September 1971

history of the internet8
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

how the internet works
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

DSL, cable modem,fixed wireless, Wi-Fi, and satellite modems

Connection must be established each time you log on.

Connection is always on—whenever the computer is running

p. 70

how the internet works10
How the Internet Works

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

then click Wireless Internet Service Providerbelow Chapter 2

Next

What are ways to access the Internet?

  • ISP, Regional or National
  • OSP (AOL and MSN, for example)
  • WISP – wireless Internet
  • service provider

p. 71 – 72 Fig. 2-2

how the internet works11
How the Internet Works

Next

How might data travel the Internet using acable modem connection?

Backbone Maps

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

p. 73 Fig. 2-3

how the internet works12
How the Internet Works

Next

What is a Hypertext Transfer Protocol (HTTP) ?

  • A set of rules that define how to transfer or convey information over the Internet.

“http://www.temple.edu”

  • To learn more about how the Internet works click here to watch a video.

p. 73 - 74 Figs. 2-4 – 2-5

how the internet works13
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

http://64.233.183.104/

http://155.247.166.60/

http://208.65.153.253/

p. 73 - 74 Figs. 2-4 – 2-5

how the internet works14
How the Internet Works

Temple web server

DNS server

Internet

210.155.123.1

155.102.123.1

What is a domain name system (DNS)?

  • A method used by the Internet to store domain names and the corresponding IP addresses.
    • so data can be routed to the correct computer.
  • DNS server is an Internet server that translates the domain name (text version) into its associated IP address (numeric version).

210.155.123.1

www.temple.edu

the world wide web
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, audio, 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 web16
The World Wide Web

MicrosoftInternetExplorer

Netscape

Firefox

Opera

Safari

Next

What is a Web browser?

  • Program that allows you to view Web pages

p. 75

the world wide web17
The World Wide Web

Next

What is a home page?

  • The first page that a Web site displays
  • Often provides connections to other Web pages

p. 68, 76 Fig.2-6

the world wide web18
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

the world wide web19
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 web20
The World Wide Web

Next

What is uploading?

  • The process of a computer sending information

p. 76

the world wide web21
The World Wide Web

Next

What is a URL (uniform resource locator)?

Unique address for a Web page

A web server delivers the Web page to your computer

p. 76 - 77 Fig. 2-8

the world wide web22
The World Wide Web

Next

What is a hyperlink (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

the world wide web23
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

the world wide web24
The World Wide Web

Next

What is a subject directory?

  • Search tool with organized set of categories and subcategories
  • Lets you find information by clicking links rather than entering keywords

http://dir.yahoo.com/

http://directory.google.com/

p. 78 – 79

the world wide web25
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 web26
The World Wide Web

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 web27
The World Wide Web

Next

What are the twelve basic types of Web sites?

Portal

News

Informational

Business/Marketing

Educational

Entertainment

Advocacy

Blog

Wiki

SocialNetwork

ContentAggregator

Personal

p. 82 – 84

the world wide web28
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, online communities(Web sites that join people with similar interests)

p. 82 - 83

the world wide web29
The World Wide Web

Next

What is a wiki?

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

p. 82-84

the world wide web30
The World Wide Web

Next

What is a blog?

  • Uses a regularly updated journal format to reflect the interests, opinions, and personalities of the author and sometimes site visitors
  • vlogs, blogospheres, and vlogospheres
    • http://www.engadget.com/

p. 82 - 83

the world wide web31
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
    • Google news
    • http://en.wikipedia.org/wiki/Google_News#Sources_for_news

p. 83 - 84

the world wide web32
The World Wide Web

Next

What is an educational Web site?

  • Offers avenues for formal and informal teachingand learning
  • Learn how airplanesfly or how to cook ameal
  • Some colleges offer online classes and degrees

p. 82 - 83

the world wide web33
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 web34
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

the world wide web35
The World Wide Web

Next

What graphics formats are used on the Web?

BMP

GIF(pronounced JIFF)

JPEG(pronounced JAY-peg)

TIFF

PNG(pronounced ping)

p. 85 Fig. 2-17

the world wide web36
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 web37
The World Wide Web

Next

What is animation?

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

p. 86

the world wide web38
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 AAC, AIFF, ASF, MP3, WAV, WMA, RA, and QT
  • Once downloaded, you can play (listen to) the contents of the files
  • A podcast is recorded audio, usually an MP3 file, stored on a Web site that can be downloaded to a computer or a portable media player

p. 86 - 87 Fig. 2-20

the world wide web39
The World Wide Web

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

then click YouTubebelow Chapter 2

Next

What is video?

  • Consists of full-motion images, most with sound, that are played back at various speeds
  • MPEG (Moving Pictures Experts Group) is popular video compressionstandard

p. 88 Fig. 2-21

the world wide web40
The World Wide Web

Next

What is streaming audio/video?

The process oftransferring audio/videoin a continuous

and even flow

Enables you tolisten to music or watch a

video as it downloadsto your computer

SkreemR

p. 86

the world wide web41
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 – 89 Fig. 2-22

the world wide web42
The World Wide Web

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

the world wide web43
The World Wide Web

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 - 90 Fig. 2-24

e commerce
E-Commerce

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

then click PayPalbelow 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 - 92 Fig. 2-25

other internet services
Other Internet Services

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 (Gmail the best?!)
    • Common outgoing email protocol used by email servers is

SMTP – Simple Mail Transfer Protocol

    • Common incoming email protocol is

POP – Post Office Protocol

  • One of the original services
  • on the Internet
other internet services46
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

other internet services47
Other Internet Services

Step 1.Using e-mail software, you create and send message

Step 2.Your software contacts software on your service provider’s outgoing mail server

Step 4.When recipient uses e-mail software to check for e-mail messages, the message transfers from incoming mail server to recipient’s computer

Step 3.Software on outgoing mail server determines best route for data and sends message, which travels along Internet routers to recipient’s incoming mail server

Next

How does an e-mail message travel?

p. 95 Fig. 2-28

other internet services48
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 services49
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 services50
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 services51
Other Internet Services

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 - 99 Fig. 2-33

other internet services52
Other Internet Services

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

then click Internet Telephony below Chapter 2

Next

What is internet telephony?

  • Enables users to speak to other users over the Internet

p. 99 - 100 Fig. 2-34

netiquette
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