Session No 2
The Internet and
World Wide Web
11/27/13

Developed By: Saif Ullah Dar

1
Chapter 2 Objectives
Discuss how the Internet works

Define Webcasting

Understand ways to access the
Internet

Describe t...
The Internet
What is a network?


A collection of
computers and
devices connected
together via
communications
devices and...
The Internet
What is the Internet?



Also called the Net
A worldwide
collection of
networks that links
millions of
busi...
The Internet
What are some of the services found on the
Internet?
instant messaging

e-mail
Web
message board
chat
file tr...
History of the Internet
How did the Internet originate?

ARPANET
Networking project
by Pentagon’s
Advanced Research
Projec...
History of the Internet
What is a host node?








Next
p. 2.4

University of
California at
Los Angeles

Also calle...
History of the Internet
How has this network grown?
Today
More than 100 million host nodes

1984
More than 1,000 host node...
History of the Internet
What is NSFnet?
The National Science Foundation’s network
 Five supercomputer centers
 Connected...
History of the Internet
Who provides the structure for the Internet today?

Networks from
corporations,
commercial
firms, ...
History of the Internet
Who controls the Internet?
The Internet is a public, cooperative, and
independent network
 No sin...
Technology Trailblazer
Tim Berners-Lee


Created the World Wide Web



Director of the
World Wide Web
Consortium
(W3C) a...
How the Internet Works
What is an Internet service provider (ISP)?




A business that
has a permanent
Internet
connecti...
How the Internet Works
What is a point of presence (POP)?

An access
point on the
Internet

Next
p. 2.5

11/27/13

Accesse...
How the Internet Works
What are other service providers?
Online Service
Provider (OSP)

• Supplies Internet
access

• Has ...
Company on the Cutting
Edge
America Online





World’s leading online service provider
Services include electronic
mai...
How the Internet Works
What are ways to access the Internet?
1 Regional
Internet
Service
2 National
Provider’s
Internet
PO...
How the Internet Works
How can you connect to the Internet?
High speed connection
• Employees and students
• Computers par...
How the Internet Works
What are three parts of an Internet connection?
Server
• Computer that

•

•

manages the
resources...
How the Internet Works
1: You initiate an
How might

data travel the Internet using a telephone line
action to request
Reg...
How the Internet Works
What is an Internet protocol (IP) address?




Number that uniquely identifies each computer or
...
How the Internet Works
What is a domain name?




Text version of an IP address
Components are separated by periods
Eac...
How the Internet Works
What is a top-level domain (TLD) abbreviation?
 Identifies the type of organization associated
wit...
How the Internet Works
What systems control domain names?
Internet Corporation for Assigned
Names and Numbers (ICANN)
Grou...
The World Wide Web
What is the World Wide Web (WWW)?







Also known as the Web
A worldwide collection of electron...
The World Wide Web
What is a Web browser?
Also called a browser
 Software
program that
allows you to
access and
view Web
...
The World Wide Web
Step 1

How can you establish a connection and start the Web
1 Double-click
browser? an
Step 2
icon on ...
The World Wide Web
What is a home page?






Next
p. 2.10

Starting page for a browser
Provides
information
about the...
The World Wide Web
What is downloading?
The process of receiving
information, such as a Web
page, onto your computer
from ...
The World Wide Web
How do Web-enabled handheld computers and
devices access the Web?






Use a special type
of browse...
The World Wide Web
What is a hyperlink?
Also called a link
 Built-in
connection to
another related
Web page or part
of a ...
The World Wide Web
How can you identify a link?







Next
p. 2.12



Link can be a word, phrase, or image
Text link...
The World Wide Web
How do you navigate a variety of links?
Some links
display a
different color
Some links are
when you po...
The World Wide Web
What is surfing the Web?
Links can point to an item on the same Web
page, a different Web page at the s...
The World Wide Web
What is a Uniform Resource Locator (URL)?





Unique address for a Web page
Browser retrieves a We...
The World Wide Web
What are the parts of a URL?
protocol

domain name

path

http://www.nationalgeographic.com/travel/inde...
The World Wide Web
What is a Web server?
A computer that delivers (serves)
Web pages you request
 The same Web server can...
The World Wide Web
What is a search engine?


A software program you can use to find Web
sites, Web pages and Internet fi...
The World Wide Web
What is a hit?


Any Web page name that
lists as the result of a
search
363 hits

hit
Next
p. 2.14 Fig...
The World Wide Web
What are some
widely used
search engines?

Next
p. 2.15 Fig. 2-12

11/27/13

Developed By: Saif Ullah D...
The World Wide Web
What is a directory?





An organized
set of topics
Used by a
search engine
to aid in
locating Web
...
The World Wide Web
What are the six basic types of Web pages?

advocacy
Web page

news
Web page

business/marketing
Web pa...
The World Wide Web
What is an advocacy Web page?




Next

Contains
content that
describes a
cause,
opinion,or
idea
Purp...
The World Wide Web
What is a business/marketing Web page?




Contains
content that
promotes or
sells
products or
servic...
The World Wide Web
What is an informational Web page?
Contains
factual
information
 Many U.S.
government
sites
provide
in...
The World Wide Web
What is a news Web page?




Contains
newsworthy
material
Stories and
articles relating
to current
ev...
The World Wide Web
What is a portal Web page




Often called a
portal
Offers a variety
of Internet
services from a
sing...
The World Wide Web
What services are often found on a portal?
search
engine
local ,
national, and
worldwide
news

e-mail
s...
The World Wide Web
What is a Web community?
A Web site that joins a specific group of
people with similar interests or rel...
The World Wide Web
What is a wireless portal?






A portal specifically designed
for Web-enabled handheld
computers a...
Company on the Cutting
Edge
Yahoo!


Co-founded by Jerry Yang and David Filo
in 1994

Started as a series
of lists
to org...
The World Wide Web
What is a personal Web page?




A Web page
maintained by a
private
individual who
normally is not
as...
The World Wide Web
What is multimedia?
Any application that integrates text with
other media elements
 Often used for Web...
The World Wide Web
What is a graphic?





Also called a
graphical image
A digital
representation of
information such
a...
The World Wide Web
What are the formats for graphics files on
the Web?

Next
p. 2.18 Fig. 2-16

11/27/13

Developed By: Sa...
The World Wide Web
Which two formats are most popular for the Web?
JPEG (Joint
Photographic Experts
Group)

GIF (Graphics
...
The World Wide Web
What is a thumbnail?






A small version of
a larger graphical
image
Used because
graphics files c...
The World Wide Web
What is animation?






Next
p. 2.19

The appearance of motion
created by displaying a
series of st...
The World Wide Web
What is a marquee?
Text that animates by
scrolling across the
screen
 Pronounced mar-KEE


tion
anima...
The World Wide Web
What is audio?
Music, speech, or
any other sound
 Individual sound
files that you
download to your
com...
The World Wide Web
What is MP3?






Next
p. 2.20

A popular technology
that compresses
audio
Reduces an audio file
to...
The World Wide Web
How can you play MP3 files?
Most current
operating systems
contain a program
called a player
• plays au...
The World Wide Web
What is streaming audio?
Also called streaming
sound
 Enables you to listen to
the sound as it
downloa...
The World Wide Web
What is video?
video

Consists of fullmotion images
that are played
back at various
speeds
 Most video...
The World Wide Web
What video formats are used on the Web?
MPEG standard
(Moving Pictures
Experts Group)
 Individual vide...
The World Wide Web
What is a Web cam?
Also called a
cam
 A video camera
whose output
displays on a
Web page
 Shows image...
The World Wide Web
What is virtual reality (VR)?






The use of computers to simulate a real or imaged
environment th...
The World Wide Web
What is pull and push technology?
Pull
 Obtaining information by
requesting it from a site
 Relies on...
The World Wide Web
What is Webcasting?





Another name for push technology
Delivers information at regular intervals ...
Electronic Commerce
What is electronic commerce?


Also known as e-commerce



A financial
business
transaction
that occ...
Electronic Commerce
What are the three types of e-commerce?
Business to consumer
(B-to-C or b2C)
Sale of goods to the gene...
Electronic Commerce
What are some features of e-commerce?


Electronic storefront
• The place where a customer
visits an ...
Technology Trailblazer
Masayoshi Son
Helped to bring Japan to the forefront of the
digital age
 Founded Softbank Corporat...
Web Publishing
Step 1

Step 2

What is Web Publishing?


The development and
maintenance of Web
pages

1 Plan: Think abou...
Web Publishing
What is needed for creating a Web page?


Also called Web page authoring
Hardware
• Digital camera
• Scann...
Web Publishing
What is a plug-in?
An additional program that extends the
capability of a browser
 Many plug-ins can be do...
Web Publishing
How do you deploy a Web site?
Locate a Web
server to store your
site
• Provided by many

Click to view Web ...
Web Publishing
What else might be needed to create a Web site?
Apply to an
official registrar
for a specific
domain name

...
Other Internet Services
What is e-mail?





Electronic mail
The transmission of messages and files via a
computer netw...
Other Internet Services
Step 1

How do you
send an e-mail
message?

Step 2

1 Start an e-mail program and
2 point thethe N...
Other Internet Services
What is an Internet e-mail address?


A combination of a user name and a domain name
that identif...
Other Internet Services
How can you get e-mail?




Most ISPs and OSPs provide an Internet e-mail
program and a mailbox ...
Other Internet Services
What is a POP server?







Post office protocol server
When a message arrives
at the recipie...
Other Internet Services
How does an
e-mail
message
travel?
1 Using e-mail software,
you create and send a
2 Your software ...
Other Internet Services
What is FTP?


File Transfer Protocol



An Internet
standard that
allows you to
upload and
down...
Other Internet Services
What are some FTP terms?
FTP server
A computer that
allows users to
upload and
download files
usin...
Other Internet Services
What is a newsgroup?
An online area in which users conduct written
discussions about a particular ...
Other Internet Services
What is a newsreader?


A program that enables you to access a
newsgroup
article

A previously en...
Other Internet Services
What is a message board?
A type of discussion group that does not require
a newsreader
 Also call...
Other Internet Services
What is a
mailing list?
A group of e-mail
names and
addresses given
to a single name
 When a mess...
Other Internet Services
What is a chat?






A real-time typed
conversation that
takes place on a
computer
Real-time m...
Technology Trailblazer
Lavonne Luquis







Journalist
Started LatinoLink,
the first general
interest Web
magazine fo...
Other Internet Services
What is instant messaging (IM)?


A real-time Internet
communications
service
• Notifies you when...
Other Internet Services
What is
netiquette?
Internet
etiquette
 Code of
acceptable
behaviors
users should
follow while
on...
Summary of the Internet
and World Wide Web
The Internet
 History of the Internet
 How the Internet works
 The World Wid...
Chapter 2 Complete

11/27/13

Developed By: Saif Ullah Dar

96
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Introduction of Web and Networking

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Session no 2 For BZU

  1. 1. Session No 2 The Internet and World Wide Web 11/27/13 Developed By: Saif Ullah Dar 1
  2. 2. Chapter 2 Objectives Discuss how the Internet works Define Webcasting Understand ways to access the Internet Describe the uses of electronic commerce (e-commerce) Identify a URL Identify the tools required for Web publishing Know how to search for information on the Web Describe the types of Web pages Explain how e-mail, FTP, newsgroups and message boards, mailing lists, chat rooms and instant messaging work Identify the rules of netiquette Next p. 2.2 Recognize how Web pages use graphics, animation,audio, video, and virtual reality 11/27/13 Developed By: Saif Ullah Dar 2
  3. 3. The Internet What is a network?  A collection of computers and devices connected together via communications devices and media • Modems • Cables • Telephone lines • Satellites Next p. 2.2 11/27/13 Developed By: Saif Ullah Dar 3
  4. 4. The Internet What is the Internet?   Also called the Net A worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals Next p. 2.2 11/27/13 Developed By: Saif Ullah Dar 4
  5. 5. The Internet What are some of the services found on the Internet? instant messaging e-mail Web message board chat file transfer Next p. 2.3 Fig. 2-1 11/27/13 Developed By: Saif Ullah Dar 5
  6. 6. History of the Internet How did the Internet originate? ARPANET Networking project by Pentagon’s Advanced Research Projects Agency (ARPA) Next p. 2.3 11/27/13 Goal: To allow scientists at different locations to share information and work together on military and scientific projects Goal: To function even if part of the network were disabled or destroyed Ullah Dar Developed By: Saif Became functional in September 1969 6
  7. 7. History of the Internet What is a host node?      Next p. 2.4 University of California at Los Angeles Also called a host Any computer that Stanford directly connects to a Research network Institute Often stores and University of transfers data and California at messages Santa Barbara Provides network University of connections for other Utah computers Four original nodes on ARPANET 11/27/13 Developed By: Saif Ullah Dar 7
  8. 8. History of the Internet How has this network grown? Today More than 100 million host nodes 1984 More than 1,000 host nodes 1969 Four host nodes Next p. 2.4 11/27/13 Developed By: Saif Ullah Dar 8
  9. 9. History of the Internet What is NSFnet? The National Science Foundation’s network  Five supercomputer centers  Connected to ARPANET in 1986  NSFnet ARPANET The Internet Next p. 2.4 11/27/13 Developed By: Saif Ullah Dar 9
  10. 10. History of the Internet Who provides the structure for the Internet today? Networks from corporations, commercial firms, and other companies Telephone companies Satellite companies Cable companies Government Next p. 2.4 11/27/13 Developed By: Saif Ullah Dar 10
  11. 11. History of the Internet Who controls the Internet? The Internet is a public, cooperative, and independent network  No single entity controls or owns the Internet  Several organizations advise and define standards  World Wide Web Consortium (W3C) • Oversees research and Next p. 2.4 sets standards and guidelines 11/27/13 Internet2 (I2) • Internet-related research and development project • Develops and tests advanced Internet technologies Developed By: Saif Ullah Dar 11
  12. 12. Technology Trailblazer Tim Berners-Lee  Created the World Wide Web  Director of the World Wide Web Consortium (W3C) at MIT Click to view Web Link then click Tim Berners-Lee Next p. 2.4 11/27/13 Developed By: Saif Ullah Dar 12
  13. 13. How the Internet Works What is an Internet service provider (ISP)?   A business that has a permanent Internet connection Provides temporary connections to individuals and companies for free or for a fee Next p. 2.5 11/27/13 Regional ISP Provides access to the Internet through one or more telephone numbers local to a specific geographic location National ISP Provides local telephone numbers in most major cities and towns nationwide May also provide a toll-free Developed By: Saif Ullah Dar number 13
  14. 14. How the Internet Works What is a point of presence (POP)? An access point on the Internet Next p. 2.5 11/27/13 Accessed by dialing a telephone number Select a service provider with at least one local POP telephone number Developed By: Saif Ullah Dar 14
  15. 15. How the Internet Works What are other service providers? Online Service Provider (OSP) • Supplies Internet access • Has many membersonly features that offer special content Wireless Service Provider • Company that provides wireless Internet access Click to view Web Link then click Service Providers Next p. 2.5 11/27/13 Developed By: Saif Ullah Dar 15
  16. 16. Company on the Cutting Edge America Online    World’s leading online service provider Services include electronic mail, software, computer support services, Internet access Founded in 1985 by Stephen M. Case Click to view Web Link then click AOL Next p. 2.6 11/27/13 Developed By: Saif Ullah Dar 16
  17. 17. How the Internet Works What are ways to access the Internet? 1 Regional Internet Service 2 National Provider’s Internet POP Service 3 Online Provider’s Service’s POP Local POP 4 Wireless Online Service Internet (special Service members-only content) Provider 2 1 3 4 local call local call Next p. 2.5 Fig. 2-2 11/27/13 long-distance call Developed By: Saif Ullah Dar local call toll-free call toll-free call local 17 call
  18. 18. How the Internet Works How can you connect to the Internet? High speed connection • Employees and students • Computers part of a local area network (LAN) • Connect to service provider through a high-speed connection line leased from local telephone company Dial-up access • Home or small business • Computer, modem, regular telephone line • Dial into an ISP or OSP Newer high-speed technologies • Home and small business • Digital subscriber line (DSL) – provides high-speed Internet Next p. 2.6 connections over regular copper telephone line Developed By: Saif Ullah Dar • Cable11/27/13 modem- provides high-speed Internet connections through cable television network 18
  19. 19. How the Internet Works What are three parts of an Internet connection? Server • Computer that • • manages the resources on a network Provides a centralized storage area for resources such as programs and data Also called a host computer Backbone • Inner structure • of the Internet Communications lines that carry the heaviest amount of traffic Client • Computer that can access the contents of the storage area on the server Click to view Web Link then click Internet Backbone Next p. 2.6 11/27/13 Developed By: Saif Ullah Dar 19
  20. 20. How the Internet Works 1: You initiate an How might data travel the Internet using a telephone line action to request Regional 2: Aconnection? modem the data from converts 3: 4: 5: 6: 7: 8: the digital signals Internet. Data the computer from (request) travels through into analog signals, Data may pass to a telephone which are lines through one or local ISP. by understood The regional ISP more routers telephone lines. uses lines, leased before reaching its The national ISP from destination. final a telephone routes data across company, tofrom a Data moves send the country to a local dataserver retrieves national ISP to The to a national another national ISP.and then to a ISP the requested data ISP. destinationit back and sends server. through the Internet backbone to your computer. Step 1 ISP Step 5 Step 2 Step 4 National ISP Local ISP Step 6 Internet backbone Step 8 Step 7 Next p. 2.7 Fig. 2-3 Step 3 11/27/13 Developed By: Saif Ullah Dar 20 National ISP
  21. 21. How the Internet Works What is an Internet protocol (IP) address?    Number that uniquely identifies each computer or device connected to the Internet Four groups of numbers, each separated by a period Number in each group is between 0 and 255 IP address 199.95.72.10 last part identifies specific computer first part identifies network Next p. 2.8 Fig. 2-4 11/27/13 Developed By: Saif Ullah Dar 21
  22. 22. How the Internet Works What is a domain name?    Text version of an IP address Components are separated by periods Each domain name represents one or more IP addresses IP address Domain name 199.95.72.10 www.scsite.com Next p. 2.8 Fig. 2-4 11/27/13 Developed By: Saif Ullah Dar 22
  23. 23. How the Internet Works What is a top-level domain (TLD) abbreviation?  Identifies the type of organization associated with the domain  Sometimes called dot com when TLD is com Next p. 2.8 Fig. 2-5 11/27/13 Developed By: Saif Ullah Dar 23
  24. 24. How the Internet Works What systems control domain names? Internet Corporation for Assigned Names and Numbers (ICANN) Group that assigns and controls TLDs Domain name system (DNS) System on the Internet that stores the domain names and their corresponding IP addresses Next p. 2.8 11/27/13 DNS server Translates the domain name into its associated IP Developed By: Saif Ullah Dar address 24
  25. 25. The World Wide Web What is the World Wide Web (WWW)?       Also known as the Web A worldwide collection of electronic documents Each document on the Web is called a Web page Can contain text, graphics, sound, and video Can contain built-in connections to other documents A Web site is a collection of related Web pages Next p. 2.9 11/27/13 Developed By: Saif Ullah Dar 25
  26. 26. The World Wide Web What is a Web browser? Also called a browser  Software program that allows you to access and view Web pages  Two popular browsers for personal computers • Netscape Next • Internet p. 2.9 Fig. 2-6 11/27/13 Explorer  Developed By: Saif Ullah Dar 26
  27. 27. The World Wide Web Step 1 How can you establish a connection and start the Web 1 Double-click browser? an Step 2 icon on the desktop, such as 2 Internet Explorer, If you are not connected to to start your the Internet already, browser. 3 Connection to the your computer Internet occurs attempts to and a home page establish a displays. Shown a connection with here is an AOL service provider. home page. Your If necessary, click home page may the Connect vary. button. Internet Explorer icon Next p. 2.10 Fig. 2-7 11/27/13 Step 3 Developed By: Saif Ullah Dar 27
  28. 28. The World Wide Web What is a home page?     Next p. 2.10 Starting page for a browser Provides information about the site’s purpose and content Some Web sites also refer to their starting page as a home page May be changed at any time 11/27/13 Developed By: Saif Ullah Dar 28
  29. 29. The World Wide Web What is downloading? The process of receiving information, such as a Web page, onto your computer from a server on the Internet Can take from a few seconds to several minutes Next p. 2.11 You can speed up the display of pages by turning off the graphics and displaying only text in most Web browsers 11/27/13 Developed By: Saif Ullah Dar 29
  30. 30. The World Wide Web How do Web-enabled handheld computers and devices access the Web?    Use a special type of browser designed for their small screens Microbrowser – software program that accesses and displays Web pages that contain mostly text Also called a minibrowser Next p. 2.11 Fig. 2-8 11/27/13 Microbrowser for a Web-enabled cellular telephone Microbrowser for a Webenabled Developed By: Saif Ullah Dar handheld computer 30
  31. 31. The World Wide Web What is a hyperlink? Also called a link  Built-in connection to another related Web page or part of a Web page  Allows you to obtain information Click to view in a nonlinear way animation  Next p. 2.12 11/27/13 Developed By: Saif Ullah Dar 31
  32. 32. The World Wide Web How can you identify a link?     Next p. 2.12  Link can be a word, phrase, or image Text links usually are underlined or in a color different from the rest of the document A graphical link may change its appearance when you point to it The shape of the pointer on the screen changes to a small hand with a pointing index finger when you position it on a link or point to the link Click the link to activate it 11/27/13 Developed By: Saif Ullah Dar 32
  33. 33. The World Wide Web How do you navigate a variety of links? Some links display a different color Some links are when you point underlined. to them. Clickto Click the link Some links are the link the display to graphical display its associated images. Click associated Web site or the link to Web site or page. display its Web page. associated Web site or Web page. pointer Next p. 2.12 Fig. 2-9 11/27/13 Developed By: Saif Ullah Dar 33
  34. 34. The World Wide Web What is surfing the Web? Links can point to an item on the same Web page, a different Web page at the same Web site, or a separate Web page at a different Web site in another city or country  The activity of jumping from one Web page to another is surfing  Next p. 2.12 11/27/13 Developed By: Saif Ullah Dar 34
  35. 35. The World Wide Web What is a Uniform Resource Locator (URL)?     Unique address for a Web page Browser retrieves a Web page by using the URL Also called a Web address Type the URL into the address text box on the browser and press the Enter key to display a Web page http://www.nationalgeographic.com/travel/index.html Next p. 2.13 Fig. 2-10 11/27/13 address address text box Developed By: Saif Ullahbox text Dar 35
  36. 36. The World Wide Web What are the parts of a URL? protocol domain name path http://www.nationalgeographic.com/travel/index.html Click to view Web Link then click URLs Next p. 2.13 Fig. 2-10 11/27/13 Developed By: Saif Ullah Dar 36
  37. 37. The World Wide Web What is a Web server? A computer that delivers (serves) Web pages you request  The same Web server can store multiple Web sites  http://www.nationalgeographic.com/travel/index.html Next p. 2.13 Fig. 2-10 11/27/13 Developed By: Saif Ullah Dar 37
  38. 38. The World Wide Web What is a search engine?  A software program you can use to find Web sites, Web pages and Internet files Search text A word or phrase entered in the search engine’s text box Also called keywords Click to view video Next p. 2.14 11/27/13 Spider A program that reads pages on Web sites in order to find Web pages that contain the search text Also called a crawler Developed By: Saif Ullah Dar or bot 38
  39. 39. The World Wide Web What is a hit?  Any Web page name that lists as the result of a search 363 hits hit Next p. 2.14 Fig. 2-11 11/27/13 Developed By: Saif Ullah Dar 39
  40. 40. The World Wide Web What are some widely used search engines? Next p. 2.15 Fig. 2-12 11/27/13 Developed By: Saif Ullah Dar 40
  41. 41. The World Wide Web What is a directory?    An organized set of topics Used by a search engine to aid in locating Web sites Each major topic has related subtopics Next p. 2.15 Fig. 2-13 11/27/13 Developed By: Saif Ullah Dar 41
  42. 42. The World Wide Web What are the six basic types of Web pages? advocacy Web page news Web page business/marketing Web page informational Web page portal Web page personal Web page Next p. 2.16 11/27/13 Developed By: Saif Ullah Dar 42
  43. 43. The World Wide Web What is an advocacy Web page?   Next Contains content that describes a cause, opinion,or idea Purpose is to convince the reader of the validity of the cause, opinion, or idea p. 2.16 Fig. 2-14a 11/27/13 Developed By: Saif Ullah Dar 43
  44. 44. The World Wide Web What is a business/marketing Web page?   Contains content that promotes or sells products or services Often allows you to purchase products or services online Next p. 2.16 Fig. 2-14b 11/27/13 Developed By: Saif Ullah Dar 44
  45. 45. The World Wide Web What is an informational Web page? Contains factual information  Many U.S. government sites provide information  Next p. 2.16 Fig. 2-14c 11/27/13 Developed By: Saif Ullah Dar 45
  46. 46. The World Wide Web What is a news Web page?   Contains newsworthy material Stories and articles relating to current events, life, money, sports, and the weather Next p. 2.16 Fig. 2-14d 11/27/13 Developed By: Saif Ullah Dar 46
  47. 47. The World Wide Web What is a portal Web page   Often called a portal Offers a variety of Internet services from a single, convenient location Next p. 2.16 Fig. 2-14e 11/27/13 Developed By: Saif Ullah Dar 47
  48. 48. The World Wide Web What services are often found on a portal? search engine local , national, and worldwide news e-mail sports and weather free personal Web pages Next p. 2.17 11/27/13 maps stock quotes instant messaging newsgroups or message boards reference tools shopping malls and auctions chat rooms calendars Developed By: Saif Ullah Dar 48
  49. 49. The World Wide Web What is a Web community? A Web site that joins a specific group of people with similar interests or relationships  Usually offer special services to facilitate communication among members  newsgroup or message board Next p. 2.17 11/27/13 e-mail online photo albums Developed By: Saif Ullah Dar chat room 49
  50. 50. The World Wide Web What is a wireless portal?    A portal specifically designed for Web-enabled handheld computers and devices Attempts to provide all information a wireless user might require Services include search engines, news, stock quotes, weather, maps, e-mail, calendar, instant messaging, and shopping Next p. 2.17 11/27/13 Developed By: Saif Ullah Dar 50
  51. 51. Company on the Cutting Edge Yahoo!  Co-founded by Jerry Yang and David Filo in 1994 Started as a series of lists to organize favorite Web sites  Today more than 166 million visitors Click to view Web Link then click Yahoo! access 189 million Next pages daily p. 2.17 11/27/13 Developed By: Saif Ullah Dar  51
  52. 52. The World Wide Web What is a personal Web page?   A Web page maintained by a private individual who normally is not associated with any organization Reasons: job hunting and sharing life experience with the world Next p. 2.17 Fig. 2-14f 11/27/13 Developed By: Saif Ullah Dar 52
  53. 53. The World Wide Web What is multimedia? Any application that integrates text with other media elements  Often used for Web pages to add appeal  Multimedia Web pages often require more time to download because they contain large graphics and video or audio clips  audio graphics Next p. 2.18 11/27/13 animation virtual reality Developed By: Saif Ullah Dar video 53
  54. 54. The World Wide Web What is a graphic?    Also called a graphical image A digital representation of information such as a drawing, chart, or photograph First media used to enhance textbased Internet Next p. 2.18 Fig. 2-15 11/27/13 Developed By: Saif Ullah Dar 54
  55. 55. The World Wide Web What are the formats for graphics files on the Web? Next p. 2.18 Fig. 2-16 11/27/13 Developed By: Saif Ullah Dar 55
  56. 56. The World Wide Web Which two formats are most popular for the Web? JPEG (Joint Photographic Experts Group) GIF (Graphics Interchange Format) Also uses compression techniques to reduce file size  Works best for images with only a few distinct colors, such as line drawings, single-color borders, and simple cartoons  Graphical image that uses compression techniques to reduce the file size  Smaller sizes result in faster downloading of Web page  The more compressed the file, the smaller the file, but the lower the quality 11/27/13  Next p. 2.19 Developed By: Saif Ullah Dar 56
  57. 57. The World Wide Web What is a thumbnail?    A small version of a larger graphical image Used because graphics files can be time consuming to display Usually click thumbnail to display the fullsized image Next p. 2.19 Fig. 2-17 11/27/13 Developed By: Saif Ullah Dar 57
  58. 58. The World Wide Web What is animation?    Next p. 2.19 The appearance of motion created by displaying a series of still images in rapid sequence Adds visual interest or draws attention to important information or links Animated GIF uses computer animation and graphics software to combine several images into a single GIF file 11/27/13 Developed By: Saif Ullah Dar 58
  59. 59. The World Wide Web What is a marquee? Text that animates by scrolling across the screen  Pronounced mar-KEE  tion animation * with animation** ** *interest with with animation * interest animation*** *interest rest withwithadd*** ** interest**animation* with with*animationadd *add add interest**animation* *add*interest animation * * ****add*interest*add*interest*with*with*anim* add add ** inte * Next p. 2.19 11/27/13 Developed By: Saif Ullah Dar 59
  60. 60. The World Wide Web What is audio? Music, speech, or any other sound  Individual sound files that you download to your computer  music speech other sound Next p. 2.20 11/27/13 Click icon to hear audio clip. Press the Esc key to cancel. Developed By: Saif Ullah Dar 60
  61. 61. The World Wide Web What is MP3?    Next p. 2.20 A popular technology that compresses audio Reduces an audio file to about one-tenth of its original size while preserving the original quality of the sound MP3 file are easily copied  Controversy with respect to copyright from the Web infringement 11/27/13 Developed By: Saif Ullah Dar 61
  62. 62. The World Wide Web How can you play MP3 files? Most current operating systems contain a program called a player • plays audio in MP3 files on your computer  Portable audio devices called MP3 players Click to view • play MP3 files Web Link stored on CD or then click MP3 Next miniature storage p. 2.20 Fig. 2-18 media11/27/13 plays music stored on CD  plays music stored on Developed By: Saif Ullah Dar clik! disk 62
  63. 63. The World Wide Web What is streaming audio? Also called streaming sound  Enables you to listen to the sound as it downloads  Many radio and television stations use streaming audio to broadcast  Two accepted standards • Windows Media Player Click to view • RealAudio – a Web Link then click component of Streaming Media RealPlayer Next  p. 2.21 Fig. 2-19 11/27/13 Developed By: Saif Ullah Dar 63
  64. 64. The World Wide Web What is video? video Consists of fullmotion images that are played back at various speeds  Most video also has accompanying audio  Next p. 2.22 Fig. 2-20 11/27/13 Developed By: Saif Ullah Dar 64
  65. 65. The World Wide Web What video formats are used on the Web? MPEG standard (Moving Pictures Experts Group)  Individual video files that you must download completely before you can play them on the computer component of RealPlayer • Windows Media Player Next p. 2.22 Streaming video  Allows you to view longer or live video images as they download to your computer  Two widely used standards • RealVideo – a 11/27/13 Developed By: Saif Ullah Dar 65
  66. 66. The World Wide Web What is a Web cam? Also called a cam  A video camera whose output displays on a Web page  Shows images that change regularly  Next p. 2.22 Web cam 11/27/13 Developed By: Saif Ullah Dar 66
  67. 67. The World Wide Web What is virtual reality (VR)?    The use of computers to simulate a real or imaged environment that appears as a three-dimensional (3D) space VR world – a 3-D site that contains infinite space and depth Used for games as well as many practical applications Next p. 2.22 Fig. 2-21 11/27/13 Developed By: Saif Ullah Dar 67
  68. 68. The World Wide Web What is pull and push technology? Pull  Obtaining information by requesting it from a site  Relies on a client to request a Web page from a server Push  Server automatically downloads content to your computer at regular intervals ticker tape pushed to desktop from Microsoft Investor Web site Next p. 2.23 Fig. 2-22 11/27/13 Developed By: Saif Ullah Dar 68
  69. 69. The World Wide Web What is Webcasting?    Another name for push technology Delivers information at regular intervals without you having to request it Information can be viewed whether you are online or offline ticker tape pushed to desktop from Microsoft Investor Web site Next p. 2.23 11/27/13 Developed By: Saif Ullah Dar 69
  70. 70. Electronic Commerce What is electronic commerce?  Also known as e-commerce  A financial business transaction that occurs over an electronic network such as the Internet Next p. 2.24 Fig. 2-23 11/27/13 Developed By: Saif Ullah Dar 70
  71. 71. Electronic Commerce What are the three types of e-commerce? Business to consumer (B-to-C or b2C) Sale of goods to the general public Consumer to consumer (C-to-C or C2C) One consumer sells directly to another Business to business (B-to-B or B2B) Next p. 2.25 Businesses providing goods and services to 11/27/13 Developed By: Saif Ullah other businessesDar 71
  72. 72. Electronic Commerce What are some features of e-commerce?  Electronic storefront • The place where a customer visits an online business  Shopping cart • Allows the customer to collect purchases Online auction • Site where you can bid on an Click to view  Web Link then click E-Commerce item being sold by someone else Next p. 2.25 11/27/13 Developed By: Saif Ullah Dar 72
  73. 73. Technology Trailblazer Masayoshi Son Helped to bring Japan to the forefront of the digital age  Founded Softbank Corporation in 1981   By 1995, Softbank controlled one-half of the personal computer software in Japan  Click to view Web Link then click Masayoshi Son Next p. 2.25 A leading member of Japan’s Prime Minister’s IT Strategy Council By: Saif Ullah Dar 11/27/13 Developed 73
  74. 74. Web Publishing Step 1 Step 2 What is Web Publishing?  The development and maintenance of Web pages 1 Plan: Think about issues that could affect the design of the 2 Analyze and Design: Sketch a Web site. design of the Web page on 3 paper. Create the Web site in Create: a software package such as 4 Deploy: Copy (upload) the word processing. Web site from your hard disk 5 Maintain: server. revise your to a Web Visit and Web site regularly to be sure it is working and current. Step 4 Step 3 Step 5 Next p. 2.26 Fig. 2-24 11/27/13 Developed By: Saif Ullah Dar 74
  75. 75. Web Publishing What is needed for creating a Web page?  Also called Web page authoring Hardware • Digital camera • Scanner • Sound card • Microphone • PC camera Software to prepare HTML • HTML (hypertext markup language) • A set of special codes that format a file for use as a Web page • Created with either: • Word processing package Next p. 2.26 11/27/13 • Web page authoring Developed By: Saif Ullah Dar software 75
  76. 76. Web Publishing What is a plug-in? An additional program that extends the capability of a browser  Many plug-ins can be downloaded at no cost Click to view Web Link from the Web then click  Plug-ins Next p. 2.28 Fig. 2-25 11/27/13 Developed By: Saif Ullah Dar 76
  77. 77. Web Publishing How do you deploy a Web site? Locate a Web server to store your site • Provided by many Click to view Web Link then click Web Publishing ISPs and OSPs at no additional cost • Provided by a Web hosting service for a monthly fee Upload, or copy, the site to the Web server Next p. 2.29 11/27/13 Developed By: Saif Ullah Dar 77
  78. 78. Web Publishing What else might be needed to create a Web site? Apply to an official registrar for a specific domain name Click to view Web Link then click Submission Services Next p. 2.29 11/27/13 Register site with search engines using a submission service • A Web-based business that helps register your site Webmaster Individual responsible for maintaining a Web site and developing Developed By: Saif Ullah Dar 78 Web pages
  79. 79. Other Internet Services What is e-mail?    Electronic mail The transmission of messages and files via a computer network Use an e-mail program to work with messages create Click to view Web Link then click E-mail Next p. 2.31 send forward store print receive 11/27/13 delete Developed By: Saif Ullah Dar 79
  80. 80. Other Internet Services Step 1 How do you send an e-mail message? Step 2 1 Start an e-mail program and 2 point thethe New Mail Click to New Mail Message button to display 3 Message button Enter the recipient’s e-mail 4 Click the Insert File button Step 4 the Message subject, and address, the window to attach a JPG file 5 the message pictureMessage When Sallya in the to the containing receives the ewindow mail message, she openson message. Locate the file the JPG file to view click its your hard disk and the picture. icon for the file name. An displays. Click the Send button to send the message. Next p. 2.30 Fig. 2-26 11/27/13 Step 3 Developed5 Saif Ullah Dar Step By: 80
  81. 81. Other Internet Services What is an Internet e-mail address?  A combination of a user name and a domain name that identifies a user so he or she can receive Internet e-mail user name or user-ID A unique combination of characters that identifies you at domain name Identifies the mail server Next p. 2.31 Fig. 2-27 11/27/13 Developed By: Saif Ullah Dar 81
  82. 82. Other Internet Services How can you get e-mail?   Most ISPs and OSPs provide an Internet e-mail program and a mailbox on a mail server as a standard part of their Internet access services Some Web sites provide e-mail services free of charge address book mail server Allows you to store a list of names and e-mail addresses The server that contains the mailboxes mailbox Next p. 2.33 11/27/13 Storage location usually residing on the computer that connects you to the Developed By: Saif Ullah Dar Internet 82
  83. 83. Other Internet Services What is a POP server?     Post office protocol server When a message arrives at the recipient’s mail server, the message transfers to a POP or POP3 server POP server holds an e-mail message until the recipient retrieves it with his or her e-mail software POP3 is the newest version Next p. 2.32 11/27/13 Developed By: Saif Ullah Dar 83
  84. 84. Other Internet Services How does an e-mail message travel? 1 Using e-mail software, you create and send a 2 Your software contacts message. 3 software on your service Software on the mail provider’s mail server. 4 server determines the The mail server transfers 5 When the recipient uses best route forto a POP3 the message the data e-mail software to check and sends the message, server. for e-mail messages, the which travels along message transfers the Internet routers to from the POP3 serverserver. recipient’s mail to the recipient’s computer. Next p. 2.32 Fig. 2-28 11/27/13 Step 1 Step 2 Step 5 mail server Step 4 Internet routers mail Step 3Developed By: Saif Ullah Dar server POP server 84
  85. 85. Other Internet Services What is FTP?  File Transfer Protocol  An Internet standard that allows you to upload and download files with other computers on the Internet file download window Next p. 2.33 Fig. 2-29 11/27/13 Developed By: Saif Ullah Dar 85
  86. 86. Other Internet Services What are some FTP terms? FTP server A computer that allows users to upload and download files using FTP FTP site A collection of files that reside on an FTP server Next p. 2.33 11/27/13 Developed By: Saif Ullah Dar anonymous FTP Anyone can transfer some, if not all, available files 86
  87. 87. Other Internet Services What is a newsgroup? An online area in which users conduct written discussions about a particular subject  A user sends a message to the newsgroup  Other users in the newsgroup read and reply to the message  Usenet The entire collection of Internet newsgroups Next p. 2.33 11/27/13 news server A computer that stores and distributes newsgroup messages Developed By: Saif Ullah Dar 87
  88. 88. Other Internet Services What is a newsreader?  A program that enables you to access a newsgroup article A previously entered message post Add an article to a news group thread Also called threaded discussion Next p. 2.33 11/27/13 The original article and all subsequent related replies Developed By: Saif Ullah Dar 88
  89. 89. Other Internet Services What is a message board? A type of discussion group that does not require a newsreader  Also called a discussion board  Click to view Web Link then click Newsgroups and Message Boards Next p. 2.34 Fig. 2-30 11/27/13 Developed By: Saif Ullah Dar 89
  90. 90. Other Internet Services What is a mailing list? A group of e-mail names and addresses given to a single name  When a message is sent to a mailing list, every person on the list receives a copy of the message  Subscribe or unsubscribe to mailing list to add or remove your name from the mailing list Next p. 2.34 Fig. 2-31 11/27/13 90  Some are known as Developed By: Saif Ullah Dar LISTSERVs 
  91. 91. Other Internet Services What is a chat?    A real-time typed conversation that takes place on a computer Real-time means that you and the people with whom you are conversing are online at the same time A chat room is a location on an Internet server that permits users to chat Click to view Web Link then click Chat Rooms Next p. 2.35 Fig. 2-32  A chat client is a program on your computer 11/27/13 that allows you to chat Developed By: Saif Ullah Dar 91
  92. 92. Technology Trailblazer Lavonne Luquis     Journalist Started LatinoLink, the first general interest Web magazine for Latinos Now known as Latino.com More that 280,000 visitors each month Click to view Web Link then click Lavonne Luquis Next p. 2.35 11/27/13 Developed By: Saif Ullah Dar 92
  93. 93. Other Internet Services What is instant messaging (IM)?  A real-time Internet communications service • Notifies you when one or more people are online • Allows you to exchange messages or files or join a private chat with them Click to view Web Link then click Instant Messaging Next p. 2.36 Fig. 2-33 Karen’s message immediately displays on Katy’s computer screen because she is online 11/27/13 Katy’s response to Karen message sent from Karen to Katy Developed By: Saif Ullah Dar 93
  94. 94. Other Internet Services What is netiquette? Internet etiquette  Code of acceptable behaviors users should follow while on the Internet  Click to view video Next p. 2.37 Fig. 2-34 11/27/13 Netiquette Golden Rule: Treat others as you would like them to treat you. •2.Read the newsgroups, and chat 1.In e-mail, FAQ or posting Avoid sending spam, or an Use abbreviationsexpress emoticons (frequently to for phrases unsolicited message sent or rooms: flames,questions) such as emotionwhich are abusive to many asked recipients at once. Considered insulting messages •3.Use yourby thename for your Keep Smile BTW : ) messages way user brief Internet junk mail. • Do not participate in flame wars, personal use only • Use proper spelling and grammar :( FYI Frown your information for which are exchanges of flames 4.Do not assume material is • Be l Indifference it’s worth FWIW for what : polite accurate or up to date • Avoid offensivehumble opinion IMHO in my language : Undecided 5.Never read someone’s private • Do not use all capital letters which is e-mail ta ta for now TTFN :o Surprised the equivalent of SHOUTING! TYVM thank you very much • Clearly identify a spoiler: a message that reveals a solution to a game or Developed By: movie 94 ending to aSaif Ullah Dar or program
  95. 95. Summary of the Internet and World Wide Web The Internet  History of the Internet  How the Internet works  The World Wide Web  Electronic commerce  Web publishing  Other Internet services  Netiquette  Next 11/27/13 Developed By: Saif Ullah Dar 95
  96. 96. Chapter 2 Complete 11/27/13 Developed By: Saif Ullah Dar 96

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