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Computer Science IGCSEPDF 54
142 pagesrevision 46930
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Ch5: The Internet and Its Uses
1. The Internet and the World Wide Web
Internet
The Internetisa
that communicate usingstandardtransmissionprotocols.
global network of interconnected computers and devices
Uses TCP/IP (Transmission Control Protocol / Internet Protocol) for sending
and receiving data between devices.
Enables users worldwide to exchange information and communicate via:
o Email
o Voice and video calls
o Instant messaging
o File transfer and online collaboration
It consists of millions of private, public, academic, and government networks
linked together.
TheInternetacts asthe
the
infrastructure
,whereastheWorldWideWebisoneof
services
that runonit.
World Wide Web (WWW)
● The World Wide Web
is a collection of
webpages, websites, and multimedia
content
that can be accessed via the Internet.
Ituses
HTTP or HTTPS protocols
forcommunication.
Webpagesareusuallywrittenin
HTML (HyperText Markup Language)
Accessedthrough
web browsers
suchasChrome,Firefox,Edge,orSafari.
Each webpagehas a
unique address (URL)
usedtolocateitontheInternet.
The WWW allows access to:
o Hyperlinked text and media
o Interactive web applications
o Databases and online services
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