Online Resources Activity 1 PowerPoint - Davis.K12.ut.us

enginestagΔίκτυα και Επικοινωνίες

26 Οκτ 2013 (πριν από 3 χρόνια και 10 μήνες)

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ON LINE
INFORMATION

History of the Internet

What is the Internet?


The world’s largest
computer network.


A collection of local,
regional and national
computer networks.


The Internet is linked
together with other
networks to exchange
data and distribute
processing tasks.

ARPANET was the first
official INTERNET


First network developed
in 1969 by scientists and
military experts


Allowed them to share
information and research
data over long distances


An experimental network
designed to see how
well distributed networks
work

Today’s Internet


The Internet changed into the
World Wide Web
(WWW).



The change began in a scientific
laboratory in Geneva, Switzerland.



The laboratory was called
CERN

(
C
ounseil
E
uropean Pour la
R
echerche
N
ucleaire


European Laboratory for Particle Physics
)




What is a:


LAN?

Local Area Network
.


These computers are
near

each other
sharing information


WAN?

Wide Area Network


These computers are in different
geographical sites.

What is a Modem?


A
MO
-
dulator
DE
-
M
odulator.




A device that lets a personal
computers communicate with other
computers over telephone lines.



Converts electronic signals

to sound waves and back again.

How Is Information Sent
Over the Internet?


In packets,
downloading a
section at a time.

What is the Address Bar?



It is the URL


Uniform Resource Locator display.



It has a four part addressing scheme:




Transfer Protocol
/

Domain Name

/
Pathname
/

Filename

1

2

3

4

http://

www.usoe.k12.ut.us
/

default
/

whatsnew.html

What is the:


Refresh Button?


It lets you try again when loading information if
the network is not working properly or
temporarily out of order.


Home Button?



It takes you back to the Home Page quickly.

What is a Browser?


Software

which allows you to view
information on the
WWW


Different
browsers can have radically different
capabilities and limitations


Internet Explorer



Mozilla Firefox


Safari


Netscape Navigator


Formerly the most popular browser



Some ISP’s provide their own Search Engines

What is an ISP?


I
nternet
S
ervice
P
rovider


A service company that provides a user
with an account on a host computer to
have access to the Internet

Name some ISP’s…


MSN


Comcast


Qwest


Earthlink


NetZero


DirectGlobal


The term we use when
exploring the Internet is…


Surfing


Clicking on links to
explore various sites
for information we are
looking for



Going back and forth
until

we find what we want

What is a Web Page?


A Home Page which outlines
information about a certain subject



It contains
links

to take you

other places on the
WWW

HTML


H
yperText
M
arkup
L
anguage


The coding scheme used to format
text for use in developing Web
Pages on the WWW

<html>

<head>

<title>welcome</title>

<meta http
-
equiv="Content
-
Type" content=

"text/html; charset=iso
-
8859
-
1">

</head>


<body bgcolor="#FFFFFF" text="#663300“

link="#663300" vlink="#663300" alink="#663300">

<table width="80%" border="0">


<tr>


<td width="5%"> <p>&nbsp;</p></td>

What is it called when you
connect to the Web Page you
are looking for?


A Hit


The access of a file by a user on
a server.



Also called a
page hit
. The
retrieval of any item, like a page
or a graphic, from a web page.


For example

when a visitor calls
up a page with four graphics,
that's five hits, one for the page
and four for the graphics.


What allows you to jump from
one Web site to another?


Links


They are usually
underlined

and a different
color of text


Mostly Blue….

HTTP


Hypertext Transfer Protocol




The transmission standard used to send an
HTML document across the WWW



Ensures reliable connections between many
different computer types



A common set of standards that ensures all
computers connected to the Internet will have
common ground on which to work

Mail sent over the Internet
is called?


Email


Electronically
communicating with
individuals outside of
your immediate area
using your computer
as the medium.

The part of the Internet that
returns bounced mail is…


The
DAEMON


It defines the problem


It reroutes the message back
to the sender with an
explanation

Chatting with someone on
the Internet is called…

Cyber Chat




Carrying on a
conversation over the
computer




BE CAREFUL!!

A User Friendly Computer


Has easily understood
commands



The computer illiterate person
can still operate the system.



A person is happy with the
computer and software they have
it is considered “User Friendly”.

When speaking about the
Internet of the future, we refer
to it as…

Cyberspace



Somewhere out
there…



In the great beyond.

What a Great Time of Life
We Live In!!!

The Internet Explorer Window

Title Bar

Status Bar

Menu Bar

Address Bar

Tool Bar

Web Page
Display Area

Start Button

Previous

Next

Resizing Buttons

Windows Task Bar

Click to see the parts of the window.

Now you are ready to Surf!

The End