Dct chapter 2

Communicating with Digital Technology
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Chapter Contents pg. 35-57

Lesson 2.1 Digital Image Technology (pg. 37)
Lesson 2.2 Communicating Online (pg. 40)
Lesson 2.3 Internet Security and Acceptable Use (pg. 47)
Lesson 2.4 Ethics and Netiquette (pg. 50)
Chapter Assessment

Copyright © by The McGraw-Hill Companies, Inc. All rights reserved. Glencoe Digital Communication Tools

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You Will Learn To

 Describe the uses of digital cameras and camcorders
 Explore different webcams on the Internet
 Describe weblogs and begin planning your own
 Explain the uses of e-mail
 Describe an acceptable use policy
 Identify security risks of computer use
 Explain ethical uses of technology and netiquette
 Define ethics and netiquette

Glencoe Digital Communication Tools

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2.1 Digital Image Technology pg. 37-39

Digital Cameras
resolution You can use a digital camera to:
The amount of detail in  Take as many photos as you want
a digital image,
measured in pixels.  Instantly delete those you do not like
pixel  Connect directly to your computer to edit, print, and
A single point in a e-mail your photos
digital image.

Resolution
A digital camera’s picture quality can be measured by
its resolution, or number of pixels.

Digital pictures usually
have a file extension
of .jpg or .jpeg,
pronounced
“dot jay-peg.”

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Digital Camcorders
A digital camera records media clips and movies,
allowing you to:
 Create movies
 Edit a video and add special effects with your
computer

DVD Recorders
A DVD recorder’s many uses include the ability to:
 Record and save television shows
 Copy home movies from VHS tapes
 Play music CDs
 Store digital pictures


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What can you do with a digital camera that is not
possible with a regular camera?

digicom.glencoe.com
Lesson 2.1, Rubric

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2.2 Communicating Online pg. 40-46

The Weblog Revolution
weblog A weblog can be created by anyone to:
An online journal that is  Share opinions and information
updated almost every
day by its author.  Keep in touch with a circle of online friends
 Allow reading access to thousands of online readers

E-Mail
With electronic mail (e-mail), you can:
 Communicate quickly with people all over the world
 Send a message to either one person or a group
 Attach files such as newsletters, digital photos, or a
spreadsheet budget


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Listservs
E-mail’s flexibility allows anyone to join a listserv. A
listserv is a large e-mail group formed by people who
share a common interest.


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Webcams
webcam
A small camera that You can use a webcam for many purposes, including:
connects to a computer  One-on-one video chats
and sends an image
over the Web.  Educational purposes
 Entertainment

Some webcam sites include:
 Alamo Cam
 Bonaire Reef Cam
 Fall Foliage Cams
 Mount St. Helens Volcano Cam
 Philadelphia International Airport


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 How has the Internet changed the way we
communicate?
 What is the purpose of a weblog?
 Give uses for a webcam.

digicom.glencoe.com
Lesson 2.2, Rubric

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2.3 Internet Security and Acceptable Use pg. 47-49

Security Risks
Both individuals and businesses can suffer from
unauthorized access problems on the Internet which can lead
to:
 Stolen information
 Damaged files, hard drives, or Web sites

Denial of Service
In a denial of service attack, someone uses computer tricks
to overload and shut down a company’s Web site.


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The Culprits
Two of the worst culprits of security risks are:
 Crackers steal information or maliciously break down
copyrighted software’s security protection
 Hackers gain unauthorized access to computer systems,
often to steal usernames or passwords


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Firewall Protection
firewall Many people use a firewall to guard against hackers,
A software program spyware, and other security risks.
that acts as a barrier
between a computer
and the Internet to Acceptable Use
protect the computer Businesses and schools often require anyone using their
from unauthorized
computer systems to sign an acceptable use policy (AUP).
access.

An AUP:
 Contains rules for using an organization’s Internet and
computer network
 Prohibits unethical or illegal purposes


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 Do you think schools and businesses have the right
to make people sign an AUP?
 Do they have the right to take away computer
privileges from someone who violates the AUP?
 Explain your answer.

digicom.glencoe.com
Lesson 2.3, Rubric

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2.4 Ethics and Netiquette pg. 50-54

The Importance of Ethics
ethics Ethics should be practiced both on and offline by:
Society’s rules for  Respecting the privacy of personal information
what is right and
what is wrong.  Using courtesy in online discussion forums
netiquette  Not accepting illegal copies of software
The manners people
use in electronic
communications. Netiquette
Online misunderstandings and errors in netiquette can often
be prevented by avoiding common tactics such as:
 Flaming, or using obscene or angry language
 Typing in all capital letters, which comes across as
shouting online


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2.4 Ethics and Netiquette pg. 50-54

A friend tells you about a Web site that lets you
download research papers. All you need to do is put
your name on it and pretend you wrote it. Is this
ethical? Explain your answer.

digicom.glencoe.com
Lesson 2.4, Rubric

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DIGITAL CAREER PERSPECTIVE pg. 54

Keeping People Moving
Name:
Javier Lopez Javier Lopez is a maintenance specialist who keeps a
major transportation organization’s vehicles running safely
Job Title:
Light Rail Train
and efficiently.
Maintenance Specialist
In his job, Javier uses a PDA (personal digital assistant)
Career Cluster: and walkie-talkie mobile phone to:
Transportation,
Distribution, and
 Order new parts
Logistics  Communicate with co-workers
 Quickly reach someone during urgent situations
 Purchase technical and specialized equipment without
the burden of unnecessary paperwork


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Keeping People Moving

Javier says, “I work in this industry because I’ve always
enjoyed watching trains. I also love the challenge of
mechanical projects, and this career keeps me well-
equipped to meet those challenges.”


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Question

How do modern advances in technology help someone in
Javier’s position?

Possible answers include:
 Allow faster and easier communication with customers
and co-workers
 Remove some time-consuming paperwork, allowing
more time to be spent on the work itself
 Speed up the production and delivery of new parts and
equipment
 Provide easier and quicker access to help during
emergencies and urgent situations


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Chapter Assessment
Question 1

What is resolution, and how is it measured? (Lesson 2.1)

Answer:
Resolution is the amount of detail in a digital image.
Resolution is measured in pixels. More pixels mean better
resolution, which means better picture quality.


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Chapter Assessment
Question 2

Give examples of two types of Internet security risks.
(Lesson 2.3)

Possible Answers include:
 Unauthorized access, including that of hackers,
crackers, and spyware
 Denial of service (DoS) attacks


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Chapter Assessment
Question 3

What trends do you see happening in communicating online
for both home and business users?

Answers may include currently popular trends of using:
 E-mail
 Instant messaging
 Discussion lists
 Online chats
 Video conferencing


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Chapter Assessment
Answer 3

Another trend is the use of the wireless technology of:
 PDAs
 Cell phones
 Other handheld devices for text messaging, video
conferencing, and accessing e-mail and the Internet


Impact of Digital Communication Tools
1
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Unit Resources

For more resources on this unit, go to the Online Learning
Center at http://www.digicom.glencoe.com.


Dct chapter 2

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