Computer networks and topologies - OCRHosting

Networks can be arranged in different topologies. Encryption is used to ensure that messages can be sent securely over a network.

Part ofComputer ScienceComputer systems

Hosting

Hosting is the storing of files and on a web server. The web server is referred to as a .

The for a includes the host name. For example, the host name bbc.co.uk is included in the URL www.bbc.co.uk.

The host name consists of three levels, which work in reverse order of the name:

The BBC's host name broken down into three hierarchical levels

The top level root is generic to many websites. Examples of this level include:

  • .com
  • .uk
  • .net
  • .gov
  • .edu

The second level denotes the type of organisation:

  • .co
  • .org
  • .sch
  • .ac

The third level is the organisation name:

  • bbc
  • ocr
  • microsoft
  • apple

Put together, unique names can be created.