What is a unified resource locator?
The uniform resource locator, also known to the URL of the abbreviation, is a means of entering the location and access methods of the object on the Internet. It contains a scheme or protocol name that describes how access to an object. It also includes a network location together with optional query and fragment identifiers. A very common use for the URL is to direct the browser to the web. Request for comments (RFC) 1630 was the first standard of the URL, issued by the Internet Engineering Task Force (IETF) working group in 1994. The name without the associated location or access method became known as the uniform source name (URN). The combination of these two concepts was born a term unified resource identifier (URI). Uri can be the identity of the Urn, the URL or both. It can even refer to an object that is not network.Ferred at all. However, the URL remains a popular name with the general public and printing. The latest URI specifications, published in 2009 as RFC 3986, clarify the concepts of URL, URN and URI.
The unified resource locator consists of two parts. The first is the name of the Uri scheme, followed by the large intestine. The diagram defines a protocol or other method used to access the source. The Internet Assigned Office of the Number (Iana) manages the lengthy list of registered URI schemes. Hypertext Transport Protocol (HTTP), Secure HTTP (HTTPS), and file transfer protocol (FTP) are probably the most common. Many unregistered schemes are also used.
The second part of the uniform locator of sources is specific to the scheme and can include several components. This part of the URL HTTP often begins www. followed by the name of the domain. Instead of the domain name, you can use the Numeric Internet Protocol (IP) address. THENAZEV can follow the path to a specific object. Query chain, name of fragment facing an object, or both may also be present.
When entering the URL web page in the browser are schemeand part of the domain name often optional. If he is omitted, "http: //" or "http: // www." will usually assume a web browser. The path, question or fragment may also contain limited special characters in hexadecimal numerical form. Space -%20 - is most commonly used. The internationalized resource identifier (IRI) also allows unicode characters all the time.
More than one unique uniform search engine can describe the path to the same object. Search engines can use a process called URL normalization to determine whether more URL actually refers to the same thing. Web browsers and search engines do it too. The URL may also point to an object that cannot be found - has moved or has never existed.