Lesson Plan
Course Title: Principles of IT
Session Title: Networks and Hackers
Lesson Duration:
Lesson length is subjective and will vary from instructor to instructor.
Performance Objective:
Upon completion of this assignment, the student will be able to build a small network and
identify the different types of hackers.
Specific Objectives:
By the end of this lesson, students will be able to
• Define a computer system
• Identify the parts of a network
• Create a network with the following components: Workstation, Server, Modem, Hub,
Switch, and Routers.
• Define the types of networks including Peer-to-Peer and Client Server (Ethernet, Token
Ring, LAN, WAN)
• Identify the different types of operating systems
• Identify hackers and common security threats
Preparation
TEKS Correlations:
§130.272 Principles of Information Technology:
(8) The student analyzes network systems. The student is expected to
(A) identify hardware associated with telecommunications and data networking such
as servers, routers, switches, hubs, and network connectors;
(B) identify and describe various types of networks such as peer-to-peer, local area
networks, wide area networks, wireless token ring, and Ethernet;
(C) identify and describe functions of network operating systems.
Instructor/Trainer
References:
•
•
•
•
http://www.automation-drive.com/ethernet-hubs
http://www.ehow.com/how-does_4682850_ethernet-work.html
http://www.ehow.com/facts_4965621_what-computer-hacker.html
http://www.ehow.com/about_5410891_types-internet-security-threats.html
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
Instructional Aids:
• HANDOUT: Teen Hacker Article
• Networks and Hackers Presentation
• HANDOUT: Networks and Hackers Notes for the Presentation
• HANDOUT: Lab Assignment
• HANDOUT: National Treasure Extension Assignment
Materials Needed:
• Instructional aids
• Paper for students to draw on
• Color pencils, markers, and/or crayons to draw with
• Flash cards for students to create review materials
• National Treasure movie – only needed for extension assignment!
Equipment Needed:
• Projector for teacher computer
Learner
• This is an introduction on networks and hackers for students. No previous knowledge is
needed.
Introduction
MI
Introduction (LSI Quadrant I):
SAY, “How many of you have ever logged onto a computer at school, the
library, or a home office with more than one computer?”
ASK, “Have you ever wondered how it all works?”
Outline
MI
Outline (LSI Quadrant II): Teachers can use the
Networks and Hackers Presentation and Handout and
Lab.
Instructor Notes:
I.
Hand out the Teen Hacker Article Handout
to the students to read.
I.
II.
Hand out the Networks and Hackers Notes
Handout or advise students to take notes
during the presentation.
II.
Hand out this article
for the students to
read for homework
ahead of this lesson.
Hand out copies of the
Network and Hacker
Notes to each
student, or you can
advise each student
to get ready to take
notes.
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
III.
Show the presentation, which
covers the following concepts:
a. Computer system
b. Parts of a network
I. Workstation
ii. Server
Iii. Modem
iv. Hub
V. Switch
vi. Router
C. Types of networks
I. Peer-to-peer
ii. Client server
1. Ethernet
2. Token ring
3. Lan
4. Wan
d. Operating systems
e. Hackers
F. Security threats
III.
Students should be
taking notes as you
are showing the
Networks and
Hackers
Presentation.
IV.
Hand out the Lab Assignment to students.
They will create diagrams of the networks
based on seniors listed.
IV.
Students should
draw out 3 different
types of networks
listed on the Lab
Assignment.
Have them
create a
legend for the
different parts of
the network they
are trying to draw –
like a box with the
word Router for a
router.
V.
Work through the SOHO portion of the lab
together – the key listed is one of many
solutions.
VI.
Work through the
SOHO setup as a
class so
that students
understand what
you are looking for.
VII.
Student groups need to finish up the Lab
Assignment.
V.
Divide students into
groups of two or
three. Have them
complete the Lab
Assignment for the
small office and
world wide
company.
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
VIII.
Review for Networks and Hackers Quiz
VI.
After completion of
the lab, have
students create
flash cards of the
important terms to
study for the quiz.
Application
MI
Guided Practice (LSI Quadrant III):
Do the SOHO portion of the lab as a class.
MI
Independent Practice (LSI Quadrant III):
Hand out the Lab Assignment. Divide students into groups of two or three. Have
each group work together on the following…
SAY, “Students, now that you see how we have set up a SOHO, see if you
and a partner can come up with one possible solution to the rest of the
problems on the Lab Assignment.”
Summary
MI
Review (LSI Quadrants I and IV):
SAY, “Now that we have a good understanding about Networks, we need to study
for our quiz. In your groups, each of you needs to create your own set of flash cards
to study. Work together as a group to make sure that you do not miss any important
concepts or terms. I will need to review these to make sure that I feel you are not
missing anything. I would also draw out our SOHO example so that you do not forget
it later.”
Evaluation
MI
Informal Assessment (LSI Quadrant III):
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
•
•
MI
Teacher checks for understanding while going through the SOHO portion
of the lab as a class.
Review of student-created flash cards
Formal Assessment (LSI Quadrant III, IV):
•
•
Completion of the rest of the Lab Assignment done in groups.
Networks and Hackers Quiz
Extension
MI
Extension/Enrichment (LSI Quadrant IV):
Upon completion of the Networks and Hackers Lesson, have students watch the
movie National Treasure.
Have students complete the HANDOUT: National Treasure Extension
Assignment.
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
Icon
MI
Verbal/
Linguistic
Logical/
Mathematical
Visual/Spatial
Musical/
Rhythmic
Bodily/
Kinesthetic
Intrapersonal
Interpersonal
Naturalist
Existentialist
Teaching Strategies
Personal Development
Strategies
Lecture, discussion, journal
writing, cooperative learning,
word origins
Reading, highlighting, outlining,
teaching others, reciting information
Problem solving, number
games, critical thinking,
classifying and organizing,
Socratic questioning
Mind-mapping, reflective
time, graphic organizers,
color-coding systems,
drawings, designs, video,
DVD, charts, maps
Use music, compose songs
or raps, use musical
language or metaphors
Organizing material logically, explaining
things sequentially, finding patterns,
developing systems, outlining, charting,
graphing, analyzing information
Developing graphic organizers, mindmapping, charting, graphing, organizing
with color, mental imagery (drawing in
the mind’s eye)
Use manipulatives, hand
signals, pantomime, real life
situations, puzzles and board
games, activities, roleplaying, action problems
Reflective teaching,
interviews, reflective listening,
KW L charts
Cooperative learning, roleplaying, group brainstorming,
cross-cultural interactions
Natural objects as
manipulatives and as
background for learning
Socratic questions, real life
situations, global
problems/questions
Creating rhythms out of words, creating
rhythms with instruments, playing an
instrument, putting words to existing
songs
Moving while learning, pacing while
reciting, acting out scripts of material,
designing games, moving fingers under
words while reading
Reflecting on personal meaning of
information, studying in quiet settings,
imagining experiments, visualizing
information, journaling
Studying in a group, discussing
information, using flash cards with
other, teaching others
Connecting with nature, forming study
groups with like-minded people
Considering personal relationship to
larger context
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
Student Name:
Date:
Networks and Hackers Notes:
Computer System
•
A basic computer system is made up of two parts:
(physical equipment that you can touch), and
(programs installed on the computer).
Computer Networks
•
Computer Networks allow users to
over distances. They allow
,
, and
, making them a necessary tool for
offices, schools, and homes all over the world. A computer network consists of
several
, each of which is important to making
the network function correctly as a whole.
Network: Parts of a Network
Workstations
•
These are known as
home or school would be called a workstation in a network.
. The computer you use at
Servers
•
Servers can look like desktop computers; however, most do not look like your “normal”
computer. Servers do not really need
and
,
. What they really need is hard drives. In most
schools, when you save your work, you are saving to a server. By doing this, you can
access your schoolwork from any computer that is on your school network.
Modems
•
A modem is a device that enables computers to
they receive from a network or send data in the proper form along a network.
Hubs
•
A hub is sort of like a car radio. Every computer that has that section of network (like a
radio station) can hear
that is being transmitted. All
the computers that are connected to that hub receive all the information that goes
through it. Usually, if you have a hub, you also have a
.
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Switches
•
A switch is more complex than a hub and works a lot like a two-way radio. In a room full
of people, only the person holding the other radio can hear what is being said. It keeps
track of which computers are where, and when something comes in, it sends it only to
that
--not every computer on that section of the network.
It is more secure than a hub and faster than a hub, but not as powerful as a router.
Routers
•
Routers work a lot like a
. Each computer is
given its own unique number by the router. When information comes into the router, it is
sent along to the correct number, or in this case,
•
.
There are more options built into routers than there are available to switches. A router
can have the equivalent phone options of
and
. This is beyond a switch’s capabilities.
Peer- to- Peer Network
•
This is a type of network where the computers in the network share
among each other.
•
Every computer on this network is
; all the computers run the
same
, and
for sharing.
,
•
, and other
are shared by the machine they are
plugged into, otherwise known as managed by.
Advantages
•
It is
to set up a peer-to-peer network initially.
•
You may already own the
network setup.
•
This type of network does not require the installation of dedicated
needed to get a peer-to-peer
or expensive security software.
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
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Disadvantages
•
If you have a peer-to-peer network, you need to be aware that
, such as printers, place a special demand
on the
•
in the network.
Also, due to the nature of this type of network, all of the computers on the
network provide access to all of the machine’s resources. The down side of this is
that you can unintentionally expose
to all the other users on the network.
•
There is also no
or
from hackers, viruses, etc.
Peer-to-Peer Operating Systems
•
In the peer-to-peer network operating system, each workstation has an operating
system that tells them how to
and
with each other.
•
The two software packages that allow this type of network are called
(for MACs) and
(for PCs)
Client Server Networks
Ethernet
•
Ethernet is a type of
basis of most LANs.
•
It also serves as one of the main methods for connecting a computer or network to an
between computers that forms the
.
•
The origin of Ethernet was the idea of connecting several computers together in a
network via
; since that time, it
has evolved into a much more sophisticated system that uses specialized
that connect to a central hub or
router to network several computers together.
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
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LAN
•
LAN stands for
.
•
A local area network is a group of computers that are
together that share internet access, file access, applications, storage, and allow
computers to share printers and scanners.
LAN Issues
•
For a LAN to work properly, a
must be installed on the
primary computer that is connected to the internet. Each computer connected to the LAN
must have an
•
installed.
The other issue with a LAN is that they are usually confined in a
.
WAN
•
WAN stands for
.
•
A WAN is a collection of regular
that are all interconnected to form one
.
Oftentimes, schools and even large companies will operate a WAN on premises.
Advantages
•
: School networks can be created
for students to access files throughout the school district.
: Networks speed up the file sharing and
•
saving process.
Disadvantages
: WANs save money over
•
time, but they are expensive to set up at first.
•
: WANs require maintenance of the
network, which costs both money and time.
Token Rings
•
Token rings work by sending data from one machine to the next around a
until it ends up back where it started.
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
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•
It also uses a special token passing protocol, which means that a machine can only
use the network when it has control of the
. This ensures that there
are no collisions because only one machine can use the network at any given time.
Token Ring Issues
•
In order for token rings to work,
•
all computers must check for
or
tokens.
•
all connected computers must “
”
a new leader to
a new token.
Client/Server Operating Systems
•
Client/Server setup allows the network to centralize functions and applications in
or
•
file server.
File servers become the “
” of this
system and provide
to files and resources, as
well as providing security.
•
Workstations have
on the file servers.
to the resources to files
Client/Server Operating Systems
•
There are many different kinds of software out there for this type of network. The most
popular ones are
•
•
•
•
Advantages
•
This type of network makes it easy to install
and
.
•
The server can be
have both MACs and PCs on the network.
•
Client/Server operating systems
remotely, and you can
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Disadvantages:
•
Client/Servers depend on their servers. When they go down, the
will no longer work.
•
There is a hefty
for a client/server
network. It pays off in the long run, but it requires money to set it up.
•
Large networks will require
to
maintain a client/server network and to work out the “kinks” when problems
arise.
Network Threats
Hackers
•
A computer hacker is someone who finds
security system to break into another machine.
•
in a computer’s
Hackers usually collect information on the target computer and then try to find
into the computer system.
Security Threats
•
The most common threats are
: this is unwanted commercial e-mail.
•
: can cause your computer to slow down or
•
even destroy your hard drive.
•
: this is software that gets installed on the
computer. It can cause annoying pop-ups or even steal information.
•
: hackers steal important information:
client information, bank account numbers, etc.
Hackers
•
Networks can take steps to protect their networks. The most common are
•
•
•
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
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Networks and HackersNotes: KEY
Computer System
•
A basic computer system is made up of two parts: hardware (physical equipment that
you can touch) and software (programs installed on the computer).
Computer Networks
•
Computer networks allow users to connect over distances. They allow file sharing,
hardware sharing, and instant communication, making them a necessary tool for
offices, schools, and homes all over the world. A computer network consists of several
components, each of which is important to making the network function correctly as a
whole.
Network: Parts of a Network
Workstations
•
These are known as desktop computers. The computer you use at home or school
would be called a workstation in a network.
Servers
•
Servers can look like desktop computers; however, most do not look like your “normal”
computer. Servers do not really need monitors, graphics, and sound cards. What they
really need is hard drives. In most schools, when you save your work, you are saving to
a server. By doing this, you can access your schoolwork from any computer that is on
your school network.
Modems
•
A modem is a device that enables computers to interpret data they receive from a
network or send data in the proper form along a network.
Hubs
•
A hub is sort of like a car radio. Every computer that has that section of network (like a
radio station) can hear everything that is being transmitted. All the computers that are
connected to that hub receive all the information that goes through it. Usually, if you
have a hub, you also have a router.
Switches
•
A switch is more complex than a hub and works a lot like a two-way radio. In a room full
of people, only the person holding the other radio can hear what is being said. It keeps
track of which computers are where, and when something comes in, it sends it only to
that specific computer, not every computer on that section of the network. It is more
secure than a hub and faster than a hub, but it is not as powerful as a router.
Routers
•
Routers work a lot like a telephone system. Each computer is given its own unique
number by the router. When information comes into the router, it is then sent along to
the correct number, or in this case, computer.
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•
There are more options built into routers than there are available to switches. A router
can have the equivalent phone options of call screening and caller ID. This is beyond a
switch’s capabilities.
Peer-to-Peer Network
•
This is a type of network where the computers in the network share resources among
each other.
•
Every computer on this network is equal; all the computers run the same
networking software and file systems for sharing.
•
Printers, scanners, and other external devices are shared by the machine they
are plugged into, otherwise known as managed by.
Advantages
•
It is less expensive to set up a peer-to-peer network initially.
•
You may already own the software needed to get a peer-to-peer network setup.
•
This type of network does not require the installation of dedicated server
hardware or expensive security software.
Disadvantages
•
If you have a peer-to-peer network, you need to be aware that shared
resources, such as printers, place a special demand on the computers in the
network.
•
Also, due to the nature of this type of network, all of the computers on the
network provide access to all of the machine’s resources. The down side of this is
that you can unintentionally expose private files to all the other users on the
network.
•
There is also no data security or protection from hackers, viruses, etc.
Peer-to-Peer Operating Systems
•
In the peer-to-peer network operating system, each workstation has an operating
system that tells them how to store and share resources with each other.
•
The two software packages that allow this type of network are called Appleshare (for
MACs) and Windows for Workgroups (for PCs)
Client Server Networks
Ethernet
•
Ethernet is a type of connection between computers that forms the basis of most LANs.
•
It also serves as one of the main methods for connecting a computer or network to an
Internet hub.
•
The origin of Ethernet was the idea of connecting several computers together in a
network via coaxial cables; since that time, it has evolved into a much more
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
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sophisticated system that uses specialized Ethernet cables that connect to a central
hub or router in order to network several computers together.
LAN
•
LAN stands for Local Area Network.
•
A local area network is a group of computers that are linked together that share
internet access, file access, applications, storage, and allow connected computers
to share printers and scanners.
LAN Issues
•
For a LAN to work properly, a router must be installed on the primary computer that is
connected to the internet. Each computer connected to the LAN must have an Ethernet
card installed.
•
The other issue with a LAN is that they are usually confined in a single building.
WAN
•
WAN stands for Wide Area Networks.
•
A WAN is a collection of regular local area networks that are all interconnected to form
one giant network. Oftentimes, schools and even large companies will operate a WAN
on premises.
Advantages
•
Flexible Access: School networks can be created for students to access files
throughout the school district.
•
Speed: Networks speed up the file sharing and saving process.
Disadvantages
•
Expensive to Install: WANs save money over time, but they are expensive to
set up at first.
•
Time: WANs require maintenance of the network, which costs both money
and time.
Token Rings
•
Token rings work by sending data from one machine to the next and so on around a
ring until it ends up back where it started.
•
It also uses a special token passing protocol, which means that a machine can only
use the network when it has control of the token; this ensures that there are no
collisions because only one machine can use the network at any given time.
Token Ring Issues
•
In order for token rings to work,
•
All computers must check for lost or duplicate tokens.
•
All connected computers must “vote” a new leader to create a new token.
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
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Student Name:
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Client/Server Operating Systems
•
Client/Server setup allows the network to centralize functions and applications in one or
more file server.
•
File servers become the “heart” of this system and provide access to files and
resources, as well as providing security.
•
Workstations have access to the resources to files on the file servers.
Client/Server Operating Systems
•
There are many different kinds of software out there for this type of network. The most
popular ones are
•
Macintosh OSX
•
Microsoft Windows Server
•
Novell
•
UNIX
Advantages
•
This type of network makes it easy to install new technology and new
elements.
•
The server can be accessed remotely, and you can have both MACs and PCs
on the network.
•
Client/Server Operating Systems
Disadvantages
•
Client/Servers depend on their servers. When they go down, the network will no
longer work.
•
There is a hefty investment for a client/server network. It pays off in the long run,
but it requires money to set it up.
•
Large networks will require dedicated staff to maintain a client/server network
and to work out the “kinks” when problems arise.
Network Threats
Hackers
•
A computer hacker is someone who finds access in a computer’s security system to
break into another machine.
•
Hackers usually collect information on the target computer and then try to find
access into the computer system.
Security Threats
•
The most common threats are
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•
Spam: this is unwanted commercial e-mail.
•
Viruses: can cause your computer to slow down or even destroy your hard
drive.
•
Adware/Malware: this is software that gets installed on the computer. It can
cause annoying pop-ups or even steal information.
•
Information Threats: Hackers steal important information: client
information, back account numbers, etc.
Hackers
•
Networks can take steps to protect their networks. The most common are
•
Installing a firewall
•
Advising caution on the net
•
Making sure the network is password protected, especially if using a
wireless network.
.
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Networks and Hackers Lab Assignment:
Case Studies:
1. Together, we are going to draw out a SOHO (Small Office, Home Office) Network. We need to
have the following parts in our design:
o Desktop computer
o Printer
o Scanner
o Wireless router
o A laptop
2. We have a school computer lab that wants a peer-to-peer network created for this lab. They
have the following items that need to be in the design:
o 15 desktop computers
o 5 scanners
o 1 color printer
o 1 black and white printer
3. Now, come up with your own scenario and solution. See who can be the most creative!
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Networks and Hackers Lab Assignment: KEY
Case Studies:
1. Together, we are going to draw out a SOHO (Small Office, Home Office) Network. We need to
have the following parts in our design:
o Desktop computer
o Printer
o Scanner
o Wireless router
o A laptop
Listed below are two versions of what this key can look like. This is just a sample—students can draw this
out so many ways.
Wireless
Router
Wireless
Router
Desktop
Computer
Laptop
Printer
Scanner
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2. We have a School Computer Lab that wants a peer-to-peer network created for this lab. They
have the following items that need to be in the design:
o 15 desktop computers
o 5 scanners
o 1 color printer
o 1 black and white printer
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Networks and Hackers Quiz
True/False
Indicate whether the statement is true or false.
1 All computer networks are fairly simple, containing only a few components.
A True
B False
2 A hub is like a car radio. Every computer on that section of the network can hear everything that is being
transmitted.
A True
B False
3 A switch is more powerful than a router.
A True
B False
4 A WAN is a collection of LANs forming one giant network.
A True
B False
5 WANs are a cheap investment.
A True
B False
6 There are many advantages to having a client/server operating system, one of which is that you can
have both Macs and PCs on the same network.
A True
B False
Multiple Choice
Identify the choice that best completes the statement or answers the question.
7 All computer systems are made up of two parts:
A Hardware and Firewalls
C Servers and Routers
B Software and Computers
D Hardware and Software
8 A workstation is a
A server
B desktop computer
C Router
D None of the Above
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9 A Modem
A is used only for the Internet
B is installed on every computer ever
made
C interprets data from a network
D is all you need to make a network.
10 In this type of network, all the connected computers are equal.
A Ethernet
C Peer-To-Peer
B Client/Server
D Server/Client
11 The Ethernet came about originally by
A telephone cables
B coaxial cables
C wires
D none of the above
Multiple Response
Identify one or more choices that best complete the statement or answer the question.
12 In a peer-to-peer network, the most common types of operating software used are
A AppleShare
C UNIX
B Windows for Workgroups
D Novell
13 LANs allow for the following resources to be shared:
A Files
C Printers
B Internet
D Scanners
14 The most common security threats are:
A Spam
B Firewalls
C Viruses
D Time Bombs
Case
15 Draw out a SOHO set that contains the following parts:
Desktop Computer
Printer Scanner
Wireless Router
2 Laptops
Photo Printer
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
Student Name:
Date:
Networks and Hackers Quiz
Answer Section
TRUE/FALSE
1 ANS: F
That may be true of the SOHO (Small Office, Home Office) networks, but most global companies have
WANs with hundreds of networks inside them. They can have thousands of components.
2 ANS: T
3 ANS: F
A router is more powerful than a switch.
4 ANS: T
5 ANS: F
Actually WANs are a major investment, but they pay off over time.
6 ANS: T
MULTIPLE CHOICE
7 ANS: D
It is made up of both hardware you can touch and software installed on the computer.
8 ANS: C
9 ANS: C
A modem is a device that enables computers to interpret data they receive from a network.
10 ANS: C
All of the computers will share resources, and all the computers are equal. In both Ethernet and
client/server networks, there is a server who is considered “the boss”.
11 ANS: B
MULTIPLE RESPONSE
12 ANS: A, B
UNIX and Novell are for client/server networks.
13 ANS: A, B, C, D
All are allowed to be shared on a LAN
14 ANS: A, C
Spam, viruses, adware, and information theft are the most common security threats.
CASE
15 ANS:
The student should have drawn this out just like the independent practice done as a class. The only
parts added are an extra laptop and photo printer.
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
National Treasure Extension Assignment
Write a one-page essay containing one or two paragraphs discussing the following:
o Discuss the security measures used today to protect the Declaration of Independence
and their effectiveness.
o Discuss the security measures used in the 1700s to protect the location of the map and
their effectiveness.
o Include in both discussions (where applicable) the use of the following physical
security access control measures:
 Lock
 Conduit
 Card key
 Video equipment
 Security card
 Biometric
 Passwords
 Symmetric encryption
o The essay must contain at least four examples of the above control measures of
physical security access with supporting sentences.
The essay needs to be at least one page, double-spaced, with 12-point Times New Roman font. All
margins need to be one inch. The title and header with your name needs to be 12-point Times New
Roman font as well. The essay can contain one or two paragraphs.
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
IT: [Principals of Information Technology]: [Networks and Hackers] Plan
Copyright © Texas Education Agency, 2013. All rights reserved.