Wednesday, September 9, 2009

Group20_dynamic networks:htp/ftp proxy servers


Now let us be familiar with certain terms used now and then,HTTP and FTP.Computer Networking involves communicating between the computers.So when we request a web-page a computer 'talks' to a web server through a web browser.They speak a language known as HTTP which stands forHyper Text Transfer Protocol.
For ex:
The browser says:
GET /http/1.0
Host:www.cricketnews.com

The server replies:
http/1.0 200 OK
Content-Type: text/html
{
the body of the page
}
Here we can see how the browser is communicating to the server. First the browser request's(GET /http/1.0) indicating that the browser wants to see the home page of the site and it is using 1.0HTTP protocol.The second line indicates the website of the requested page.In the first line of the server's reply (http/1.0 200 OK),indicates the server is also speaking version 1.0 and the request sent was successful and in the second line it is showing the content or type of data it is.

FTP refers to File Transfer Protocol which is an older protocol for moving files back and forth over the networks i.e actually file transfering and also its not a secured way of choice for senstive data.

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