• Medium for communication and interaction in inter connected network.

• Makes information constantly and instantly available to anyone with a connection.

 Web Browsers:

 • User agent for Web is called a browser: o Internet Explorer

 o Firefox

 Web Server:

 • Server for Web is called Web server: o Apache (public domain)

o MS Internet Information Server

Protocol:

Protocols are agreed formats for transmitting data between devices. The protocol determines: 

i. The error checking required

ii. Data compression method used

iii. The way the end of a message is signaled

iv. The way the device indicates that it has received the message