Computer Concepts PowerPoint

sandwichclippersΚινητά – Ασύρματες Τεχνολογίες

24 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

72 εμφανίσεις

COMPUTER CONCEPTS

Computer Information Systems

COURSE COMPETENCIES


Explain the functions of computer system
components.


Describe the information processing cycle.


Describe various computer input & output devices.


Describe various auxiliary storage devices.


Describe wireless and mobile devices.


Identify basic networking components.

FUNCTIONS OF COMPUTER
SYSTEM COMPONENTS

PROCESSOR


Central Processing
Unit (CPU)


Brain of a computer


Executes program
instructions

MEMORY


Main Memory /
Primary Storage


Used during
information processing
cycle


Lost when computer
powers off

INPUT DEVICES


Any peripheral (piece
of hardware
equipment) used to
provide data to the
computer


Mouse, keyboard,
camera, scanner

OUTPUT DEVICES


Any piece of
hardware used to
communicate the
results of data
processing


Speakers, printer,
monitor

STORAGE


Secondary Storage


Not directly accessible
by CPU


External hard drive,
USB flash drive,
memory card

INFORMATION PROCESSING CYCLE

PARTS OF THE INFORMATION PROCESSING CYCLE

Input

Process

Storage

Output

ROLE IN THE INFORMATION CYCLE

Data is
entered

Changes,
computations,
save for future

Communicate
results

WHAT IS THE PURPOSE OF THE INFORMATION
PROCESSING CYCLE AS IT RELATES TO
COMPUTER SYSTEMS?

The main function of a computer system is
to
process

information.

INPUT, OUTPUT, AND

STORAGE DEVICES

CD / DVD


Storage device


Optical disk


uses light
/ lasers


Often used for music,
text files, and photos


Read
-
only vs. rewritable

EXTERNAL HARD DRIVE


Storage


Stores large data sets


Connects by USB port

USB FLASH DRIVE


Storage device


Convenient &
portable


Fast!


Easy to erase / rewrite

KEYBOARD


Input device


Used to enter text
information into the
computer

MICROPHONE


Input device


Records sound &
digitizes it to be stored
in the computer for
playback

MONITOR


Output device


Provides a visual
display from the
computer

MOUSE


Input device


Handheld pointing
device that controls
the on
-
screen cursor

PRINTER


Output device


Produces a computer
image on paper


InkJet

vs. LaserJet

SCANNER


Input device


Images a printed
page or graphic by
digitizing it

SPEAKERS


Output device


Converts electric
current into sound
format

TOUCH SCREEN


Input & output device


Touch
-
sensitive display
screen on which a
user can make
choices by pressing
button images

WIRELESS & MOBILE DEVICES

WIRELESS & MOBILE DEVICES

Laptop

Small, mobile personal computer that runs on

a
single battery or AC/DC adapter

PDA

Personal

Digital Assistant; used for calculations,
clocks, calendars, games, Internet, email, radio,
etc.; characterized by touch screens

Tablet

Notebook
-

or Slate
-
shaped mobile computer;
touch screen operated with a stylus or digital pen

Smartphone

Integrates the functionality

of a mobile phone
with a PDA

BASIC NETWORKING COMPONENTS

SERVER


Computer designed to
process requests and
deliver data to other
computers over a local
network or the Internet


Central repository of data
and various programs that
are shared by other users
in a network

NETWORK INTERFACE CARD (NIC)


Expansion card that
enables a computer
to connect to a
network


Most computers now
have built
-
in NICs

ROUTER


Join multiple networks
together


Able to filter traffic by
analyzing IP addresses
of senders and
receivers

SWITCH


Joins multiple
computers together
within one local area
network


Inspects data and
determines the source
& destination

FIREWALL


Protects a computer
network from
unauthorized access


Also limit access to the
outside from internal
users

QUESTIONS?

EXIT TICKET!


3 different input devices


2 auxiliary storage devices


1 basic networking component