By Ken Snodin
Everyday we log on and get into this strange online world
called the web. Now many of us believe that the Internet and web
are the same, but though they are related, they are not quite
the same thing. The Internet or the Net as we all call it now,
is a worldwide system of interconnected computer networks. It
transmits data using the Internet protocol. The net has many
networks all tied together, carrying out many functions. These
functions may be as different as email or pages of information,
or even online chat. The Web is a read-write information space.
It has resources like text documents, images and multimedia.
It is interesting to see how the web works. Anyone accessing
the web will use a web browser like the Internet Explorer or
Mozilla Firefox and the hypertext link to the page or resource
is typed in. The address would read like this
‘http://www.example.com/mypage.html'. This address is given by
the global, distributed Internet database known as the Domain
Name System or DNS. To make this sound easier, in the above
example, the address of the server is `http://www.example.com`
and there, a request to view “mypage” is being made. HTTP or
Hypertext Transfer Protocol helps in accessing the server. The
DNS then turns all this into an individualized IP or Internet
Protocol address. This will look like a phone number with four
numbers between 0 and 255. The IP is a procedure set up by the
Internet to find a server anywhere in the world. In fact once
the IP address is known, the server can be located through the
ISP or Internet Service Provider.
Once the IP address is reached, the web site and all its
content becomes available to the user. Almost immediately the
html or hypertext markup language code is sent back and the text
and graphics are available to the browser. This happens fairly
quickly, taking just a few seconds, helping us make the most
optimum use of the web.
If things do not go as planned, the viewer will get an error
message stating 'the page cannot be displayed'. This could mean
that there is an error in the server name or the page being
searched for does not exist. Sometimes the server could be busy
or the page being searched has moved. It is best to follow the
instructions given and continue.
All this sounds very simple, but today there is high degree of
sophistication in the programming and solutions offered by a web
page. The credit for designing the concept of the web goes to
Tim Berners-Lee, when he built the "ENQUIRE". On August 6, 1991,
he posted a short summary of the World Wide Web project on the
alt.hypertext newsgroup, using the concept of HTML. This was the
debut of the Web as a service on the Internet. He applied the
idea of links to the Internet. This meant that the web became an
accumulation of pages that could be accessed by clicking on
links. Today we have benefited so much from this new
communication system which makes the world so much smaller than
before and has linked its many peoples as no other means could
have ever done.
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