Is that construction, design, and use of network, including physical (cabling, hub, bridge, switch, router and so forth).

1. 01 – Networking Basics
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2. Principles of Networking
Main Ideas Key Terms
Networks help us share network
data and resources. This file sharing
resources
increases efficiency and synchronous
cost-effectiveness. communication
Networks must be asynchronous
reliable, redundant, scalabl communication
reliable
e, secure, and fast. redundant
scalable
throughput
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3. Principles of Networking (cont.)
Reasons to Use a Network
Computer networks connect systems together
to make better use of limited resources.
Networks:
• allow users to engage in file sharing
• allow users to share resources
• centralize administration and support
• improve communication
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4. Principles of Networking (cont.)
Reasons to Use a Network
• network A system of two or more computer
systems connected together so they can share
and exchange data.
• file sharing Sharing files between computers;
the act of making files on one computer
accessible to others on a network.)
• resource Software or hardware, such as a
hard drive, printer, or scanner, that can be
shared over a network.
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5. Principles of Networking (cont.)
Reasons to Use a Network
Sharing resources, such as a printer, provides
many benefits.
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6. Principles of Networking (cont.)
Reasons to Use a Network
Networking allows two kinds of communication:
• synchronous communication When people
talk to each other at the same time.
• asynchronous communication A form of data
transmission that involves a delay of
seconds, minutes, or even days.
Communication does not happen instantly.
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7. Principles of Networking (cont.)
Traits of a Good Network
The five main traits of a good network are:
• reliability
• scalable
• redundant
• secure
• speed
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8. Principles of Networking (cont.)
Traits of a Good Network
• reliable network A dependable network that
user’s trust to work.
• scalable network A network that the
hardware or software can grow (scale) up or
down to meet an organization’s needs.
• redundant network Networks that duplicate
data and/or resources to minimize down time
and losses in the event of a disaster.
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9. Principles of Networking (cont.)
Traits of a Good Network
A server cluster acts as a single server to other
computers on the network.
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10. Principles of Networking (cont.)
Traits of a Good Network
The speed of a network is critical. Network
speed is measured by several factors, such as
the rate at which data will travel, which is
related to its throughput.
throughput The capacity to handle network
traffic. A measure for network data transfer
performance.
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11. The Evolution of Networks
Main Ideas Key Terms
Understanding how
networks evolved in the multitask
past helps you to timesharing
understand today’s terminal
technology. Future dumb terminal
networks will enable us to ARPANET
connect almost hyperlink
anywhere, anytime, and distributed computing
faster than ever before
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12. The Evolution of Networks (cont.)
The First Networks
The first computers could only perform one task
at a time. Within a few years, computers were
able to multitask and timeshare, which
increased the computer’s productivity.
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13. The Evolution of Networks (cont.)
The First Networks
• multitask A computer’s ability to work on
more than one job at a time. The processor
can turn its attention from one job to another
if one is held up waiting for input or output.
• timesharing In the early days of computers,
the concept of running multiple jobs at the
same time. The idea of switching the
computer’s processing from one task to
another and incorporating a main, or host,
computer. http://kenatz.blogspot.com/

14. The Evolution of Networks (cont.)
The First Networks
Timesharing allowed for direct human/machine
interaction through terminals.
Terminals used with timesharing computers
were known as dumb terminals.
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15. The Evolution of Networks (cont.)
The First Networks
terminal A device with a keyboard and a
monitor that connects directly to a mainframe
through a communications link or cable. The
terminal requests information from the
mainframe computer.
dumb terminal Computers consisting of
keyboards for input and screens for output. They
are wired directly to the host computer and
have little or no processing power of their own.
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16. The Evolution of Networks (cont.)
ARPANET
The U.S. Department of Defense established
ARPANET. ARPANET linked computers around
the country and provided a data highway for
military communications.
ARPANET The Advanced Research Projects
Agency Network created in the 1960s made it
possible for military and university computers to
communicate long distances and to share files
through an interconnected network.
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17. The Evolution of Networks (cont.)
ARPANET
ARPANET allowed host computers around the
country to communicate with each other.
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18. The Evolution of Networks (cont.)
Today’s Networks
• Networks have become a part of everyday life.
The original Internet was primarily a text-
based network.
• Tim Berners-Lee developed the World Wide
Web, using a graphic user interface (GUI) with
hyperlinks to access information on the
Internet.
• hyperlink Text or image that “links” the user
to another document when clicked.
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19. The Evolution of Networks (cont.)
Today’s Networks
Although the Web is only one part of the
Internet, most users think they are the
same thing.
• The Internet is hardware connected together
to create a network.
• The Web includes software (browsers) that
send information along the Internet’s
hardware. http://kenatz.blogspot.com/

20. The Evolution of Networks (cont.)
Today’s Networks
Networks are important parts of many facets of
our lives, such as the following examples:
• business
• health care
• education
• leisure and recreation
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21. Networking Careers
Main Ideas Key Terms
There are many career paths in
networking. Although network administrator
educational backgrounds for network engineer
many career paths in network architect
networking are similar, on-the- network support
technician
job experience and a continued
outsourcing
interest in learning are keys to
success in networking.
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22. Networking Careers (cont.)
Career Paths
• network administrator Trained individual
responsible for installing computers and their
operating systems and managing networks on
a daily basis.
• network engineer Highly trained individual
responsible for connecting computers to the
network and connecting networks to
networks.
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23. Networking Careers (cont.)
Career Paths
• network architect Highly trained individual
who oversees the
construction, maintenance, and expansion of
a company’s network.
• network support technician Individual with
specialized technical knowledge to
troubleshoot the many problems that arise in
network usage.
• outsourcing To hire an outside company to
handle various information technology (IT)
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24. End of now…
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