URLs and DNS

Unique Resource Locators (URLs)

Unique Resource Locators  (AKA Web Address)

An URL (aka web address) is the alpha-numerical address that humans type in to a web browser to access a website. Humans like to use URLs rather than IP Addresses because they are easy to remember.

An URL can be the name of a website or a specific page and may also contain query parameters / port numbers.

Example URLs

  • Website Address – https://www.google.com
  • Webpage Address- https://learnlearn.uk/alevelcs/
  • Webpage address with search query – https://learnlearn.uk/alevelcs/?s=internet



How DNS Works

Domain Name Service

The internet works using IP Addresses, so all URLs must be translated(resolved) into and IP address.

For example www.google.com and both point to the same place

This is the job performed by the Domain Name Service. Domain name services are usually hosted on servers.