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Here we see the home page
of the New York Public Library (they change the content of the page now and
then, so the page you see may be a little different from the one shown above).
When you pressed Enter, the
browser sent a request to the web server of NYPL.
This web server is a program running on a computer somewhere, maybe in the City
of New York. Also stored on that computer is the home page of NYPL.
The web server constantly listens
to the traffic on the Net, and when it receives your browser's request, it
studies it and performs the service required. Here it fetched the home page
and sent a response back to the web browser. That response partly
included sending the home page. The browser took the home page out of the
response and displayed it on your screen.
You may have noticed that the Location
Box currently shows the string
http://nypl.org/
In other words the beginning 'http://'
and the slash '/' was added to the originally typed string. These
additions are made by the browser because it knows what needs to be done and
the additional parts are needed for a successful request.
The string 'http://nypl.org/' is the web
address of the home page of NYPL. It is also called the URL(
Uniform Resource Locator) of the home page of NYPL.
Now every web page (i.e. every home page and other kinds of web
pages) on the Net has its own and unique URL. The URL enables a web browser to
obtain and a web server return the desired page.
So the web browser corrected the string
typed originally to a proper URL, although it doesn't hurt to type the URL
without the beginning 'http://' and the slash '/' at the end.
However, by adding the slash yourself you can get the response from the server
a little quicker as there is then less work involved for the browser and server
in finding the requested page.
The slash at the end actually denotes
the root folder of the web server. When no other web page is
given in the request, the web server returns the home page stored in the root
folder as default.
The part 'http://' at the
beginning of the URL indicates which protocol is to be used in the
communication between the web browser and the web server. The two slashes are
needed when trying to contact a server.
So with the help of a web browser you
can view web pages which are available 'on the Net'. In order to
get a page to your browser you can use the so-called URLs. We saw two
such URLs, namely:
http://www.msn.com/ (MSN Web portal)
http://nypl.org/ (The New York
Public Library)
It is often sufficient merely to type a
piece of the actual URL as we did above when typing 'nypl.org' instead
of 'http://nypl.org/'. The browser knows what is needed and adds the
missing parts.
Sometimes the browser will show the 'www.'
immediately after the colon and two slashes, sometimes not. It depends on how
the web server is configured. You can also type the string 'www.'
yourself, it makes no difference. Try for example the string 'www.nypl.org'.
Note: Often it's needed to type the 'www.'
at the beginning for a successful request.
There's more about URLs in the chapter
'Some basic terms'. Here in this chapter we'll concentrate on getting a page
into a browser.
11 Try other URLs if you like. There are many web addresses
to be found in newspapers and magazines for examples.
Summary
To open and close IE6 is fairly simple. You'll get more accustomed to it in the
chapters to come.
IE6
is one of the programs generally called web browsers.
With
a web browser you can view web pages stored on the Net.
This
chapter gave you an illustration of the representation style in this guide.
Things are explained by doing the exercises.
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