INTERNET AND WEB
INTERNET
•
In
simple words, internet is a huge number of computers that are worldwide
connected to each other. These computers are situated in many different countries
and are connected through telephone lines, cables in the ground and even
satellites in space.
•
Access to the Internet
•
Providers
give us access to the Internet. National, regional, and wireless are the three
types of internet service provider (ISP). Browsers provide access to Web
resources.
•
The
Internet and the telephone system are similar-you can connect a computer to
the Internet much like you connect a phone to the telephone system. Once you
are on the Internet, your computer becomes an extension of what seem like a
giant computer-a computer those branches all over the world. When provided with
a connection to the Internet, you can use a browser program to search the Web.
•
Internet
Service Provider (ISP).
•
The
most common way to access the Internet is through an Internet service provider (ISP).
The providers are already connected to the Internet and provide a path or
connection for individuals to access the Internet. Your college or university
most likely provides you with free access to the Internet either through its
local area networks or through a dial-up or telephone connection. There are
also some companies that offer free Internet access. Commercial Internet
service providers offer national, regional, and wireless service.
•
Difference between Internet and Web
It is easy
to get the internet and the web confused, but they are not the same thing.
•
The internet
is the actual physical network. It is made up of wires, cables, and satellites.
Being connected to this network is often described as being online. The
internet connects millions of computers and resources throughout the world.
•
The web is a
multimedia interface to resources available on the internet. Every day over a
billion users from every country in the world use the internet and the web.
•
The Most Common Uses of Internet and Web
•
Communicating
is by far the most popular internet activity. You can exchange e-mail with
your family and friends almost anywhere in the world. You can join and listen
to discussions and debates on a wide variety of special-interest topics. You
can even create your own personal web page for friends and family to visit.
•
Shopping is
one of the fastest-growing internet applications. You can visit individual
stores or a cybermall, which provides access to a variety of different stores.
You can window shop, look for the latest fashions, search for bargains, and
make purchases. You can purchase goods using checks, credit cards, or electronic
cash.
•
Searching for
information has never been more convenient .You can access some of the world’s
largest libraries directly from your home computer. You can visit virtual
libraries, search through their stacks, read selected items, and even check out
books. You will also find the latest local, national, and international news.
Most newspapers maintain an online presence and include interactive and
multimedia presentation related to current news stories.
•
Entertainment
options are nearly endless. You can find music, movies, magazines, and
computer games. You will find live concerts, movie previews, book clubs, and
interactive live games.
•
Education or e-leaning is another rapidly emerging Web application.
•
You
can take classes on almost any subject. There are courses just for fun and
there are courses for high school, college, and graduate school credit. Some
cost nothing to take and others cost a lot.
The first
step to using the Internet and Web is to get connected, or to gain access to
the Internet.
•
Browsers
•
Browsers are
programs that provide access to Web resources. This software connects you to
remote computers, opens and transfers files, displays text and images, and
provides in one tool an uncomplicated interface to the Internet and Web
documents. Browsers allow you to explore, or to surf, the Web by easily moving
from one Web site to another. Two well-known browsers are Mozilla Firefox and
Microsoft Internet Explorer
•
Different types of web browser, but
they have similar features.
•
The Internet browser
•
Home button: takes you to the first page you see when
you open your internet browser.
•
Back button: takes you back to a page you have already
visited.
•
Forward button: takes you to the page you were on before
you pressed the back button.
•
Refresh button: reloades the page you are on.
•
History button: the websites and web pages you have already
visited.
For browsers
to connect to resources, the location or address of the resources must be specified.
These addresses are called Uniform Resource Locators (URLs).
PART of
URL
•
All
URLs have at least two basic parts.
Protocol
•
Protocols
are rules for exchanging data between computers. The protocol http:// is the
most widely used Web protocol.
Domain
name (top level domain)
•
It
is the name of the server where the resource is located.
Parts
of this URL
http://www.starwars.com/seminars.html
•
http://--hypertext
transfer protocol:
•
the language computers
use to “talk” to one another
•
www—world wide
web:
•
the body of information
connected by the cables and computers of the Internet
•
.starwars—domain
name:
•
the structured, alphabetic-based,
unique name for a computer on a network
•
.com—top
level domain:
•
gives an idea of where
the document is stored
•
/seminars—file
name:
•
a folder within a
website
•
.html—hypertext
markup language:
•
the computer language
used to format documents
Top Level
Domains
•
.edu higher education
•
.com commercial
•
.gov government agency
•
.mil military
•
.org general noncommercial organization
•
.net computer network
•
Country
domains:
•
.dk .tz .de
•
E-mail
•
You
use electronic mail or e-mail to send information to someone. The big
difference with normal mail is speed. One second after you press a button to
send an e-mail, it arrives at the e-mail address you used. Even if you send it
to the other end of the world! If your computer is connected to the internet,
you can use e-mail for communicating with friends and business relations. You
can also ‘attach’ documents to an e-mail; such as reports or digital
photographs. There are special websites that give you e-mail service free of
charge. If you want to use e-mail, you simply visit one of these websites and
open an ‘e-mail account’. You get a private e-mail address which you give to
your friends, and then they can send you e-mail. To read your e-mail and to
send e-mails yourself, you visit the website again and open your personal
‘mailbox’
•
E-mail account
•
Creating an e-mail
•
Type in the email address:
Left
click in the box next
to
the To button and type
in
the address.
•
The subject line:
Tells
the person who is
receiving
the email what
it is
about.
•
Write your message in the main
body of the email.
•
Check your mail for any typing errors
and click on the send button.
•
Reading and applying to e-mails
•
Inbox:
–
letter box, where all your mails
arrive.
–
When you receive a new email it will
appear in bold in your inbox. Next to your inbox there will be a number showing
how many unread emails you have.
–
To open and read an email you have to
click somewhere on the email, such as on the subject line.
–
Reply or forward received e-mails by
clicking ”reply” or forward” when the mail is opened
•
Managing your emails
•
Inbox: where all your new emails come into
•
Sent: where copies of the emails you sent are kept
•
Trash: where all your deleted emails are stored.
•
Junk:
–
Where your junk, or spam email goes.
–
Most email programmes come with spam
filters and they should put all the spam in your junk folder.
–
Check your junk folder every now and
again as an email you want to keep might have been put into the junk folder by
mistake.
Social Plugin