💻 What is the URL-address: the history of the term structure, the distinctive features

Defining what a URL-address, and a brief history of its occurrence

To understand the term, you should know that is a concept of «URL-address." In the generalized sense under this abbreviation lies an indication of the location of a particular web resource. It can be a document file, an image or a full-fledged site, which is physically located on a remote server.

Server - a remote storage space required to accommodate the information. If we draw an analogy, this is akin to the closet, where each thing has its own shelf. Anyone who knows the location of things, may, if necessary, to take it.

She stands for Uniform Resource Locator - «uniform resource locator". With it, users can find the information he needs.

URL refers to the basic parameters of one important attribute in the syntax of the page coding - href, required for the formation of hyperlinks, all of which in combination leads to the formation of hypertext, located at the base of the World Wide Web or Internet.

His invention, the structural element is required to Tim Berners-Lee, who in 1990 proposed the use of this encoding format. URL originally used only to indicate the location of files in the vast web. In the evolution of the Internet, this marker has been applied to a common definition of the location of resources on a global sense of the term. coding system has its own standard RFC 3986 under number. The further development of the Internet leads to the fact that gradually the URL is part of a broader notion - URI.

These three letters stands for Uniform Resource Identifier: Uniform Resource Identifier. The concept involves a unique set of characters, revealing reference to Internet resources (files, pictures, e-mail or website).

A URI component is or URN Uniform Resource Name. Uniform Resource Name as the name suggests, contains the name of a particular web object, which enables the identification of its network name in the whole space.

It should be understood that the URI represents a generalized identification system. In its structure may contain URN or URL individually or together at once. It turns out that the last two identifiers may be considered as part of the URI cases.

Structure and

Since the URL is the information that allows the user access to the necessary resources should be made to specify the path for a particular structure. It is not immutable and can be simplified (excluding certain parts), but in general terms is as follows: : // : @ : /

This entry requires decryption of each element:

• a process which may otherwise be referred to as the scheme is a form of treatment for a specific resource - a network protocol;
• Login imply username to gain access and permission to provide such a right;
• host - a hostname domain represented in the DNS system, or IP-address of the resource, which consists of 4 groups of decimal digits (numbers), separated by dot. As the numbers only serve integers ranging from 0 to 255;
• port, through which the entrance to the host;
• way - the data itself, you can get information about access to the specified resource, depending on the selected protocol;
• options. This includes a variety of features of the reference pages implemented by GET method. The syntax is to use the mark "?" Before the parameter and "&" as the separator.

Sometimes writing a URL, you may receive an anchor or anchor identifier that follows the symbol "lattice" (#). As this element may indicate a specific part of the document or file identifier, which allows the user clicks a link once to get to the right place.

It allowed as a way to register the file names. Since most of the websites is based on the UNIX, mandatory file extension is not required, it is sufficient to prescribe only the name.

Common network protocols

There are conventional circuit designations network protocol, the knowledge of which allows the user to accurately represent the characteristics of the resource. Most often, using the search engines, this parameter is set the browser automatically. URL-generally accepted protocols designations can be considered:

• ftp - FTP transmission scheme (File Transfer Protocol);
• http - hypertext transfer of information on a "client-server" or HTTP;
• https - particular variety of the previous scheme, which includes SSL encryption method;
• rtmp - protocol that is used for transmission of video or audio content in real time the flow mode;
• mailto - designation of e-mail addresses;
• news - Usenet news network;
• irc - short messaging service in real time;
• smb - protocol remote access to files;
• telnet - scheme to implement a text terminal interface;
• file - designation of a local file;
• data - protocol indicating the direct access to the data;
• tel - Make a call to the specified phone.

In addition to conventional schemes, there are also exotic protocols, which are mostly used by webmasters and programmers. These include, for example, skype - access to the well-known means of communication, nfs - circuit that returns the file name in the relevant system, and other network identifiers.

Examples of URL-addresses

All existing addresses are divided into two global type - target and displayed.

Trust is the address that leads to instant redirect the user after clicking on a banner or advertisement. Most often it is just designed for the transition to a landing page. In the absence of such, a user is redirected to the start. It is possible to see the address in the corresponding line of the browser, it will look like the following:

http://promo.drcohen.ru/facelift-in-israel/

Displayed is the address that is visible to a person in the display of search results. Typically, it has a shortened form and denotes a resource for direct transition. For the above example, the displayed line location will be of the form:

https://drcohen.ru

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How to find the URL-address

Not every web user is how you can copy the desired address and where to find it. The easiest way to see in the browser. Required information is displayed in the browser address bar. One thing to consider: the record does not contain a single element - . There are very simple methods to obtain the full address.

Home site

When you open a specific portal browser's address bar does not contain a full URL. The availability of this ID appears after copying it to the clipboard. Run up in three ways:

• allocate an address and to press the key combination Ctrl + C;
• after separation of the right mouse button and select "Copy" from the drop-down menu;
• some browsers after selecting the address bar will automatically offer to copy it by pressing the button appears.

Next, the user just need to open your text editor (Word, Notepad) and paste the copied information into a document.

Image or file

Since every object on the page has a unique address, you can copy their IDs, which will be useful in the preparation of a hyperlink. To get the URL of a specific object, it is required to click on the right mouse button and select select "Copy image address" or "Copy link address" when it comes to text fragment.

Video or radio

Sometimes you need to copy the address of liked a YouTube video or an interesting channel Internet radio station. In this case, the procedure is virtually the same. If you need video URL should click on the button at the right to display a drop-down menu, which will present the item "Copy video URL." Next, the address is placed into any text document or simply inserted into the browser's address bar.

What does 404

Often when you click on a link, the user sees concisely designed screen on which is written in large letters, Error 404 or "page not found".

The main cause of this problem is to enter the wrong address. When making a request for transition to a URL the browser can not find the output data, which leads to a crash.

Sometimes the cause can be a problem in the proper operation of the host server. Typically, this occurs when the desired image or video was removed, but references to it remain.

TONOTICE! (Click to see)

How to create URL-address

When creating your own resources is very important to pay attention to the correct formation of the URL. If you are using the popular WordPress site building system, the address is generated automatically based on the title of the article, which is the primary tag. But as far as correct and right?

Why is it important to create a URL chelovekoponyatnye

There is a concept - CNC, which stands for "chelovekoponyatnye URL». The use of such a scheme is required for the user to clearly understand where he gets after clicking on the link. URL-address should be short and capacious, reflecting the essence of the content of the resource.

As long title of the page becomes an obstacle to its proper promotion. When you create SEO-optimized addresses should try to get rid of irrelevant words.

Another rule is to create CNC replace all characters in the Latin alphabet.

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Guidelines for creating URL-address

There are several rules that dictate how you must create addresses, so that they are not only human readable, but also worked to promote the site in search engines and helps to improve its place in the extradition. When you create a URL you must consider the following factors.

1. Entering keywords. Most importantly - do not abuse it, so as not to perespamit header.
2. The length of the web address should not exceed 3-5 words. Despite the lack of restrictions on the length of the header, all that exceeds the word limit is cut in the SERP.
3. The lack of large investments.
4. Creating end as an extension .html, that familiar to the user's eyes.
5. Using a hyphen to separate words together instead underscore.
6. Use for the header only lowercase letters.
7. Inclusion in the URL instead of transliteration of Russian letters, or accurate translation into English.
8. Reducing the number of special characters, which act as a stop word.
9. Access to the page is only one link to a single address.
10. Optimizing pages of the resource, since the creation of the NC all keywords are counted by the search engines in the amount for the whole site entirely.

Change the header in WordPress

If you use WordPress, you can use built-in tools for the title change, to achieve the desired relevance addresses. The editor has the "Permalink" containing the URL-address of the current page.

you must press the button "Change" and enter the required data to change the information. Most often used for this Title, subject to proper preparation. The action must be confirmed by pressing the "OK" button.

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The development of the URL in the future

Since the system encoding and identification URL has several drawbacks, including the experts distinguish encrypted challenges small flexibility, broken links and the need to create the appearance of a hierarchical structure, work is underway to create a qualitatively different form of guidance addresses.

In place of the usual URL planned to PURL. This standard will be used qualitatively different approach. It is supposed to create a unified database of addresses within which the path and domain names will be placed. The purpose of the automated system will be a constant reality check addresses and deleting references to non-existent URL. According to the developers, it will solve the above drawbacks of the modern standard.

URL-address rarely requires the average user, who operates more than by the name of the site. But sometimes, especially if you want to copy a certain object with the resources needed at least a general knowledge of the identifier. More time to learn about what a URL, you can by watching the video.