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URI

A URI (Uniform Resource Identifier) is a string of characters used to identify a resource on the internet either by location, name, or both. URIs enable the interaction with resources using specific protocols and can be classified into URLs (Uniform Resource Locators) and URNs (Uniform Resource Names).

Key components

  1. Scheme: Indicates the protocol used to access the resource, such as http, https, ftp, mailto, etc.
  2. Authority: Provides information about the domain name or IP address and may include port numbers.
  3. Path: Specifies the resource's location on the server.
  4. Query: Optional component that contains additional parameters for the resource, often used in web applications.
  5. Fragment: Optional part that identifies a specific section within the resource.

Types of URIs

  • URL (Uniform Resource Locator): Identifies the location of a resource along with the protocol to access it. Example: https://www.example.com/page.
  • URN (Uniform Resource Name): Identifies a resource by name within a specific namespace, independent of its location. Example: urn:isbn:0451450523.

Example: In the URI https://www.example.com:8080/docs/resource?query=example#section2:

  • https is the scheme.
  • www.example.com:8080 is the authority.
  • /docs/resource is the path.
  • ?query=example is the query.
  • #section2 is the fragment.

Usage: URIs are used in web addresses, API endpoints, database connections, and more, serving as a critical component for locating and accessing resources across the internet. They ensure that resources can be identified and interacted with in a standardized and predictable manner.

Understanding URIs is essential for developers, network engineers, and IT professionals to effectively design, implement, and manage web-based systems and services, ensuring robust and scalable internet communication.

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