WWW+(World+Wide+Web),+URL+(uniform+resource+locator),+internet,+intranet,+extranet

**WWW (World Wide Web)**
Tim Berners-Lee created 'www' in 1991. It is a distributed browsing and searching system which has enabled easier exploring, viewing and publishing on the internet. The internet existed previous to this however it did not have a unified standard which is what was created. For WWW to work Berners-Lee created a system to give internet documents unique addresses, wrote the HTML language and built a software for browsing these documents from remote locations.

**URL (Uniform Resource Locator)**
The URL (commonly called the web address) specifies the IP address of the server that houses the website, document or resource on the internet e.g. http://www.google.com

The first part of the address is the **protocol** of the website e.g. http (hypertext transfer protocol). The second part is the **domain name** which identifies where the resource is located e.g. www.google.com

**Internet** The internet is the largest WAN (Wide Area Network - a network that spreads across a large geographical area) in the world. It allows the sharing of information throughout the world. It is essentially a network of networks that spreads across the globe. There is no single power that controls the internet's operation or evolution.

**Intranet**
An intranet is an internal LAN (Local Area Network - a network which covers a small geographical area such as a building or a site) which allows the sharing of information and resources within the small geographical area.

Examples: The school network at JESS Arabian Ranches A business building

**Extranet**
Again a private network which is essentially an intranet which is spread across several branches in different locations.

Examples: Internal networks of JESS Ranches and JESS Jumeirah (if they were connected) Networks of supermarket branches (again if they were connected) such as Tescos

[] By Nikki Blower Last Updated: 20/11/2011