Download Shelly Cashman Series Discovering Computers 2002

Chapter 2
The Internet and
World Wide Web
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
p. 2. 2
Recognize how Web pages use
graphics, animation,audio,
video, and virtual reality
Explain how e-mail, FTP,
newsgroups and message
boards, mailing lists, chat rooms
and instant messaging work
Identify the rules of netiquette
The Internet
What is a network?

p. 2.2
A collection of
computers and
devices connected
together via
communications
devices and media
• Modems
• Cables
• Telephone lines
• satellites
The Internet
What is the Internet?


p. 2.2
Also called the Net
A worldwide
collection of
networks that links
millions of
businesses,
government
agencies, educational
institutions, and
individuals
The Internet
What are some of the services found on
the Internet?
instant messaging
e-mail
Web
message board
chat
file transfer
p. 2.3 Fig. 2-1
History of the Internet
How did the Internet originate?
ARPANET
Networking project
by Pentagon’s
Advanced Research
Projects Agency
(ARPA)
p. 2.3
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
Became
functional
in
September
1969
History of the Internet
What is a host node?





p. 2.4
University of
California at
Los Angeles
Also called a hub
Any computer that
directly connects to a
network
Often stores and
University of
transfers data and
California at
messages
Santa Barbara
Provides network
connections for other
computers
Four original nodes
on ARPANET
Stanford
Research
Institute
University of
Utah
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
p. 2.4
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
p. 2.4
History of the Internet
Who provides the structure for the Internet today?
Networks from
corporations,
commercial
firms, and other
companies
Telephone
companies
Satellite
companies
p. 2.4
Cable
companies
Government
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
sets standards and
guidelines
p. 2.4
Internet2 (I2)
• Internet-related research
and development project
• Develops and tests
advanced Internet
technologies
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
p. 2.4
How the Internet Works
What is an Internet Service Provider (ISP)?


p. 2.5
A business that
has a permanent
Internet connection
Provides
temporary
connections to
individuals and
companies for free
or for a fee
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
number
How the Internet Works
What is a point of presence (POP)?
An access
point on the
Internet
p. 2.5
Accessed by
dialing a
telephone
number
Select a service
provider with at
least one local
POP telephone
number
How the Internet Works
What are other service providers?
Online Service
Provider (OSP)
• Supplies Internet
access
• Has many membersonly features that
offer special content
Click to view Web Link
then click Service Providers
p. 2.5
Wireless Service
Provider
• Company that
provides wireless
Internet access
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
p. 2.6
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
Internet
Service
Service
(special
members-only
Provider
content)
2
1
3
4
local call
local call
p. 2.5 Fig. 2-2
long-distance call
local call
toll-free call
toll-free call
local call
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 connections over
p. 2.6
regular copper telephone line
• Cable modem- provides connection through cable
television network
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
Click to view Web Link
then click Backbone
p. 2.6
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
How the Internet Works
1: You initiate an
2:
3:
4:
5:
6:
7:
8:
How might data travel the Internet using a
connection? Step 3
action to request
A
modem
telephone
line
data
from converts
the
the
digital signals
Internet.
Data
from (request)
the computer
travels
through
into analog
signals,
Data
telephone
lines to a
whichmay
are pass
through
or
local
ISP.oneby
understood
The
regional
ISP
more
routers
telephone
lines.
uses
lines,
leased
before
reaching
its
The
national
ISP
from
a telephone
final destination.
routes
data
across
company,
to
senda
Data
moves
from
the
country
to
data
to aISP
national
national
to a
another
national
The
server
ISP.
local
ISP and then
ISP.
retrieves
the
to a a destination
requested
data and
server.
sends it back
through the
Internet backbone
to your computer.
p. 2.7 Fig. 2-3
Regional
ISP
Step 5
Step 1
Step 2
Step 4
National
ISP
Local ISP
Step 6
Internet
backbone
Step 8
Step 7
National ISP
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
first part
identifies
network
p. 2.8 Fig. 2-4
last part
identifies
specific
computer
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
identifies
top-level
domain
p. 2.8 Fig. 2-4
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

p. 2.8 Fig. 2-5
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
p. 2. 8
DNS server
Translates the domain
name into its associated IP
address
The World Wide Web
What is the World Wide Web (WWW)?






p. 2.9
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
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
• Internet
Explorer
p. 2.9 Fig. 2-6
The World Wide Web
Step 1
How can you establish a connection and start the Web
1 Double-click an
browser?
Step 2
icon on the
desktop, such as
2 If
you areExplorer,
not
Internet
connected
to the
to start your
Internet
browser.already,
3 Connection
to the
your computer
Internet
attemptsoccurs
to
and
a home
establish
a page
displays.
Shown
connection
with a
here
is an
AOL
service
provider.
home
page. Your
If necessary,
click
home
page may
the Connect
vary.
button.
p. 2.10 Fig. 2-7
Step 3
Internet
Explorer icon
The World Wide Web
What is a home page?
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

p. 2.10
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
p. 2. 11
You can speed up the display of pages by
turning off the graphics and displaying only
text in most Web browsers
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
p. 2.11 Fig. 2-8
Microbrowser for a
Web-enabled
cellular telephone
Microbrowser for a Webenabled handheld computer
The World Wide Web
What is a hyperlink?
Also called a link
 Built-in
connection to
another related
Web page or part
of a a Web page
 Allows you to
obtain information
in a nonlinear way

p. 2.12
The World Wide Web
How can you identify a link?




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
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.
Click
Click
the
link
to
Some
links
are
the
link the
to
display
graphical
display
associated
images.its
Click
associated
Web
sitetoor
the link
Web
site
or
page.
display
its
Web
page.
associated
Web site or
Web page.
pointer
p. 2.12 Fig. 2-9
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

p. 2.12
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
address
text box
p. 2.13 Fig. 2-10
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
p. 2.13 Fig. 2-10
The World Wide Web
What is a Web server?
A computer that delivers
(stores) Web pages you request
 The same Web server can store
multiple Web sites

http://www.nationalgeographic.com/travel/index.html
p. 2.13 Fig. 2-10
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
p. 2.14
Spider
A program that reads
pages on Web sites in
order to find Web
pages that contain the
search text
Also called a crawler
or bot
The World Wide Web
What is a hit?

Any Web page name that lists
as the result of a search
363 hits
hit
p. 2.14 Fig. 2-11
The World Wide Web
What are some
widely used
search engines?
p. 2.15 Fig. 2-12
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
p. 2.15 Fig. 2-13
The World Wide Web
What are the six basic types of Web pages?
advocacy
Web page
news
Web page
p. 2.16
business/marketing
Web page
informational
Web page
portal
Web page
personal
Web page
The World Wide Web
What is an advocacy Web page?


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
The World Wide Web
What is a business/marketing Web page?


Contains
content that
promotes or
sells
products or
services
Often allow
you to
purchase
products or
services
online
p. 2.16 Fig. 2-14b
The World Wide Web
What is an informational Web page?

Contains
factual
information
p. 2.16 Fig. 2-14c
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
p. 2.17 Fig. 2-14d
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
p. 2.17 Fig. 2-14e
The World Wide Web
What services are often found on a portal?
search
engine
local ,
national, and
worldwide
news
free
personal
Web pages
p. 2. 17
e-mail
sports and
weather
instant
messaging
newsgroups
or message
boards
reference
tools
shopping
malls and
auctions
chat rooms
calendars
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
p. 2.17
e-mail
online
photo
albums
chat
room
The World Wide Web
What is a wireless portal?



p. 2.17
A portal specifically designed
for Web-enabled handheld
computers and devices
Attempt 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
Company on the Cutting
Edge
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 access 189 million
then click Yahoo!
pages daily
p. 2.17

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,
sharing life
experience with
the world
p. 2.17 Fig. 2-14f
The World Wide Web
What is multimedia?
Any application that integrates text with
other 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
p. 2.18
animation
virtual
reality
video
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
p. 2.18 Fig. 2-15
The World Wide Web
What are the formats for graphics files on the
Web?
p. 2.18 Fig. 2-16
The World Wide Web
Which two formats are most popular for the Web?
JPEG (Joint
Photographic Experts
Group)
GIF (Graphics
Interchange Format)


p. 2.19
Also uses compression
techniques to reduce file
sizes
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
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
p. 2.19 Fig. 2-17
The World Wide Web
What is animation?



p. 2.19
The appearance of motion
created by displaying a
series of still images in
rapid sequence
Can make Web pages more
visually interesting or draw
attention to important
information or links
Animated GIF uses
computer animation and
graphics software to
combine several images
into a single GIF file
The World Wide Web
What is a marquee?
Text that animates by
scrolling across the
screen
 Pronounced mar-KEE

* * * * add interest with animation
p. 2.19
* * * *
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
p. 2.20
Click icon to hear audio clip.
Press the Esc key to cancel.
The World Wide Web
What is MP3?



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 from the Web
 Controversy with respect to copyright
infringement
Click to view video
p. 2.20
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
• play MP3 files
Click to view
stored on CD or
Web Link
miniature storage
then click MP3
p. 2.20 Fig. 2-18
media
plays music
stored on CD

plays music
stored on
clik! disk
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
• RealAudio – a
Click to view
component of
Web Link
then click
RealPlayer
Streaming Media

p. 2.21 Fig. 2-19
The World Wide Web
What is video?
Consists of fullmotion images
that are played
back at various
speeds
 Most video also
has
accompanying
audio

p. 2.22 Fig. 2-20
video
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
p. 2.22
Streaming video
 Allows you to
view longer of live
video images as
hey download to
your computer
 Two widely used
standards
• RealVideo – a
component of
RealPlayer
• Windows Media
Player
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

Web cam
p. 2.22
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 3D site that
contains
infinite space
and depth
Used for games
as well as
many practical
applications
p. 2.22 Fig. 2-21
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
ticker tape
pushed to
desktop from
Microsoft
Investor Web
site
p. 2.23 Fig. 2-22
Push
 Server automatically
downloads content to
your computer at regular
intervals
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
p. 2.23
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
p. 2.24 Fig. 2-23
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)
p. 2.25
Businesses providing goods and services to
other businesses
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
item being sold by someone
else
Click to view Web Link
then click e-Commerce
p. 2.25
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
p. 2.25
A leading member
of Japan’s Prime
Minister’s IT
Strategy Council
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
Web site.and Design: Sketch a
design of the Web page on
paper. Create the Web site in
3 Create:
a software package such as
4 Deploy:
word processing.
Copy (upload) the
Web site from your hard disk
5 Maintain:
to a Web server.
Visit and revise your
Web site regularly to be sure it
is working and current.
p. 2.26 Fig. 2-24
Step 4
Step 5
Step 3
Web Publishing
What is needed for creating Web page?

Also called Web page authoring
Hardware
• Digital camera
•
•
•
•
p. 2.28
Scanner
Sound card
Microphone
PC camera
Software to prepare HTML
a current
word
• HTMLUse
(hypertext
markup
processing program
language)
• A set of special codes that
format a file for use as a Web
page
• Created with either:
• Word processing package
• Web page authoring
software
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
from the Web

Click to view Web Link
then click Plug-ins
p. 2.28 Fig. 2-25
Web Publishing
How do you deploy a Web site?
Locate a Web
server to store your
site
• Provided by many
ISPs and OSPs at no
additional cost
• Provided by a Web
hosting service for a
monthly fee
Click to view Web Link
then click Web Publishing
p. 2.29
Upload, or copy,
the site to the
Web server
Web Publishing
What else might be needed to create a Web site?
Apply to an
official registrar
for a specific
domain name
Register site with
search engines
• Submission service:
a Web-based
business that helps
register your site
Webmaster
Click to view Web Link
then click Submission Services
p. 2.29
Individual responsible
for maintaining a Web
site and developing Web
pages
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
 Messages can be simple text or include an
attachment such as a graphical image or word
processing document

create
forward
send
Click to view
Web Link
then click E-mail
p. 2.31
receive
store
print
delete
Other Internet Services
Step 1
How do you
send an e-mail
message?
Step 2
1 Start an e-mail program and
point to the New Mail
2 Click
the New
Mail
Message
button
to display
3 Message
Enter the button
recipient’s
e-mail Step 4
the Message
window and
subject,
4 address,
Click the the
Insert
File button
the
message
in the
to attach
a JPG
file Message
5 window
When
Sallyareceives
thethe
econtaining
picture to
mail
message,
shethe
opens
message.
Locate
file on
the
to view
the its
yourJPG
hardfile
disk
and click
picture.
name. An icon for the file
displays. Click the Send
button to send the
message.
p. 2.30 Fig. 2-26
Step 3
Step 5
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
p. 2.31 Fig. 2-27
at
domain name
Identifies the mail server
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
p. 2.33
Storage location usually
residing on the computer
that connects you to the
Internet
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 email message until the
recipient retrieves it with
his other e-mail software
 POP3 is the newest
p. 2.32
version


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.
service
3 software
Software on
on your
the mail
provider’s
mail server.
determines
the
4 server
The mail
server transfers
bestmessage
route fortothe
data
a POP3
5 the
When the recipient
uses
and
sends
the
message,
server.
e-mail software to check
which travels along
for e-mail messages, the
Internet routers to the
message transfers from
recipient’s mail server.
the POP3 server to the
recipient’s computer.
p. 2.32 Fig. 2-28
Step 1
Step 2
Step 5
mail
server
Step 4
Internet
routers
Step 3
mail
server
POP
server
Other Internet Services
What is FTP?

File Transfer Protocol

An Internet
standard
allows you to
upload and
download
fines with
other
computers on
the Internet
p. 2.33 Fig. 2-29
file
download
window
Other Internet Services
What are some FTP terms?
FTP server
A computer that
allows users to
upload and
download files
using FTP
p. 2.33
FTP site
A collection of
files that reside on
an FTP server
anonymous
FTP
Anyone can
transfer some, if
not all, available
files
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
p. 2.33
News server
A computer that stores
and distributes
newsgroup messages
Other Internet Services
What is a newsreader?

A program that enables you to access a
newsgroup
article
A previously entered message
post
To add an article to a news group
thread
Also called threaded discussion
p. 2.33
The original article and all
subsequent related replies
Other Internet Services
What is a message board?
A type of discussion group that dos not require
a news reader
 Also called a
discussion board

Click to view
Web Link
then click
Message Boards
p. 2.34 Fig. 2-30
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
p. 2.34 Fig. 2-31
 Some are known as LISTSERVs

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
p. 2.35 Fig. 2-32
A chat client is
a program on
your computer
that allows you
to chat
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
p. 2. Fig. 2-
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
p. 2.36 Fig. 2-33
Karen’s message
immediately displays
on Katy’s computer
screen because she is
online
Katy’s response to Karen
message sent from Karen to Katy
Other Internet Services
What is
netiquette?
Internet
etiquette
 Code of
acceptable
behaviors
users should
follow while
on the Internet

Click to view video
p. 2.37 Fig. 2-34
Netiquette
• Read
In
e-mailthe
groups
FAQ
(frequently
and chat
rooms:
asked
Golden
Rule:
Treat
questions)
• Avoid
Use abbreviations
Keep
emoticons
messages
sending spam
or
tobrief
posting
express
for phrases
flames
others
as
you
• Use
emotion
such
your
as user name for your
• Proper
• Internet
Abusive
spelling
junk
or insulting
and
mailgrammar
personallike
use only
would
them
to
: )messages
BTW
Smile
by the way
• Be• polite
Unsolicited message sent to
•
Do
not
assume material is
treat
you.
• DoFYI
: (not
many
Frown
participate
for
recipients
your information
inat
flame
oncewars
• accurate
Avoid offensive
or up tolanguage
date
for what
it’s worth
: lExchanges
•FWIW
Indifference
of flames
Never
private
• Do
notread
use someone’s
all capital letters
which is
e-mail
the
:\ Undecided
IMHO
equivalent
in myof
humble
SHOUTING!
opinion
• Clearly
:o Surprised
TTFN
identify
ta ta for
a spoiler
now
•TYVM
Message
thank
that
you
reveals
very much
a solution
to a game or ending to a movie or
program
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
Chapter 2 Complete