(Published Online: 1st March 2007)
Do you know what happens when
you type a web address or URL (like www.torjtechnology.com)
into your Internet Explorer browser's URL entry bar, and click
"GO" or press "Enter"?
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Note: URL
means "Uniform Resource Locator" and is the address
for a resource(e.g. website) on the internet. It actually
represents a unique string of numbers called an Internet Protocol(IP)
address e.g. 164.205.65.105. Since words/names are easier
for people to remember than numbers, URLs are used to specify
website addresses - while the internet server "interpretes"
it to mean the "number String" address equivalent.
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The following describe the sequence
of events that occurs:
1.
Internet Explorer sends the web address(www.torjtechnology.com)
to your ISP(Internet Service Provider).
2.
The ISP sends "www.torjtechnology.com" to the nearest
node of the Domain Name Server(i.e. DNS, which is actually
a set of databases shared amongst servers that stores the
numeric addresses of Web sites. A new domain name e.g. torjtechnology.com
is added "or propagated" to these databases during
the first few weeks after the domain name is registered. Only
after this has been done, will it be possible to type the
domain name into a browser and not get a "Page not found"
error message).
3. The
DNS returns the site's numeric(IP) address to your Internet
Explorer(watch the status bar of your browser when next you're
doing this online).
4. Your
Internet Explorer sends the IP address to a router, which
checks the traffic on the Internet, and finds the least busy
path to the server containing the website(www.torjtechnology.com)
that you've requested.
5. The
server receives the IP address, acknowledges receiving it(your
status bar may momentarily read "website found"),
then places the request in a queue to wait until earlier requests(by
you or others e.g. when many people are trying to go to yahoo.com)
have been fulfilled by the server.
6. The
server then sends the website's default page(index.htm for
example) back over the Internet to your ISP, which then sends
it to your computer.
The process described in 1 to 6 above
normally happens within seconds, even with a slow internet
connection.
When you browse using a fast connection(e.g.
broadband/ satellite), the entire process can occur in an
instant.
However, sometimes when the ISP has
a problem and/or its resources are overloaded say due to many
users online at the same time, prolonged access times can
result.
That's when at steps 5 to 6 you find
yourself waiting for what seem like prolonged periods for
the webpages you requested to appear.
So, how does the above information
help you?
Well, for one thing, you are now equipped
to understand why this happens, when it does, so you should
feel less frustrated, if at all.
Secondly, this knowledge puts you in
a position to communicate more intelligently with the administrator/
support staff for your Internet connection about the problem.
Thirdly, this useful knowledge puts you
in a unique position to educate other internet users who experience
similar problems.
Share this with someone you know
would benefit from it.
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