4.3 The internet and intranets

 

The internet is an international network of computers that allows users to use email, browse the World Wide Web or to chat either by text or by voice.

The internet

Internet browsers accessing the World Wide Web allow us to visually access some of the information stored on the internet through websites

 

Webpages	Websites
Documents that can be seen on a computer May contain: Text Images Sound Animations Video	Lots of webpages that are linked together by hyperlinks. Clicking on the hyperlink allows user to navigate between webpages in the website. They also allow you to move to other website.

Intranets

Large organisations with lots of electronic material, that needs to be accessed by staff, often use an intranet. In the same way as the internet, an intranet allows users to access web-base material, share files and send email but all communication and data transfer is confined to the local networks.

Protocol	Host name	Domain name
		SLD	Sub domain	TLD	File path	File name
http://	images	.example		.com
http://	www	.example	.gov	.za	.example	page1
http://	example	.mycompany	.org	.in	example	page5
www		charter	.ac	.th
https://	www	youtube		.com
http://		google	.co	.th

In computer networks, a proxy server is a server (a computer system or an application) that acts as an intermediary for requests from clients seeking resources from otherservers.