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URL

A URL (Uniform Resource Locator) is a reference or address used to access resources on the internet. It specifies the location of a resource and the protocol used to retrieve it. A typical URL consists of several components, including the protocol (e.g., HTTP, HTTPS), domain name, path, and optionally, query parameters and fragment identifiers.

Key components 

  1. Protocol: Specifies the method used to access the resource. Common protocols are HTTP, HTTPS, FTP, and mailto. For example, https://.
  2. Domain Name: The address of the server where the resource is hosted. For example, www.example.com.
  3. Path: Specifies the exact location of the resource on the server. For example, /about.
  4. Query Parameters: Optional key-value pairs that provide additional information to the server. For example, ?id=123.
  5. Fragment Identifier: An optional component that directs to a specific part of the resource. For example, #section1.

Example: In the URL https://www.example.com/about?id=123#section1:

  • https is the protocol.
  • www.example.com is the domain name.
  • /about is the path.
  • ?id=123 is a query parameter.
  • #section1 is a fragment identifier.

Usage: URLs are used to locate web pages, access APIs, download files, and link to specific content within a document. They are an essential part of web navigation, allowing users and applications to find and interact with resources on the internet.

Understanding URLs is fundamental for developers, network administrators, and anyone involved in managing or using web-based resources, as it enables efficient and accurate access to the necessary information and services.

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