What is URL (Uniform Resource Locator) ?? - Ashutosh

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Sunday, September 3, 2017

What is URL (Uniform Resource Locator) ??

Hello, Everyone Myself Ashutosh .And today you learn About what is URL (Uniform Resource Locator)??



In Computing,a uniform Resource Locator (URL) is a Uniform Resource Identifier (URI) which also species where the identified resources is available and the protocol for retrieving it.In popular usage and in many technical documents it is often confused as a synonym for uniform resouces identifier.

 Web addresses are recorded in a Uniform Resources Locator (URL) ,A logical address of a web page that can always used to dynamically retrieve the current physical copy over the Internet.
 
The key advantage of the Uniform Resources Locator's (URL) is its universality,since the address is the same no matter where in the world it is used. This is why Tim Berners-Lee  proposed in RFC 1630, Universalresource identifier in www , that it be called a Universal resource identified (URI) to suggest his vision of a  network where anything could be linked to anything. However ,he experienced philosophical resistance to this idea of universality from the IETE  team working on the web standards, and so the address became named the now familier Uniform Resource locator.

   The word URL can be pronounces either "U-R-L" or "earl". The URL of the current page is usually shown at the top of your web browser,and should be something like " http://www.livinginternet.com/" . Most websites are accessible without a "www" prefix, originally used to differentiate web server from other server such as FTP sites,but now generally redundant. The general format of a URL is like a branch of a tree , and can include a user, password,and port host:

service://<user> : <password> @ <host> :<port>/
<folder-1>/.../ <folder-n> / <page.html>

There are several different stanfard URL formats ,listed below in rough order of frequency of use :

Table:Standard URL Formats
Webhttp://www.twenty.net/smith/index.html
FTPftp://ftp.twenty.net/pub/recipes/icecream.txt
Emailmailto://user@host
Usenetnews://user:password@host:port/newsgroup
Telnettelnet://user:password@host:port/
Gophergopher://twenty.net/00pub/main1.txt
Filefile://DI/Web site/recipes/chickensoup.html
WAISwais://twenty.net/pub/main1.txt
Prosperoprospero://twenty.net/pub/main2.txt- Historical Archie protocol.
A URL looks like a computer file path name, where the domain name is the computer, the folders are the file path, and the webpage is the file. This is how webserver match URLs to file on their hard drive however,URLs are separated by "/" and for some reason file path  names are separated with "\" leading to the following reaction from most users :

:-(      :-/     :-0.   :-&   :-@

you can select, copy , paste a URL like any other text after loading a page if you have the URL displayed. On Most web pages you can copy the URL with two commands :<tab> or <shift><tab> to highlights the URL ,and <ctrl>-c to copy . Just for the fun of it ,some people have gone to the effort of creating URL's that are palindromes - read the same forward and backwards. Jonathan Bowen had the first recorded URL palindrome at:

http://www.rdg.ac.uk/~sssbownj/jnwobsss~/ku.ca.gdr.www//:ptth/.

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