Summary
Summary CIE iGCSE Computer Science | The Internet and Its Uses
Contains all relevant notes for the Cambridge International GCSE Computer Science Paper 1 on the Internet, DNS, TLS/SSL, Cyber Security and Digital Currency.
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🌐Theory 9 - The Internet & its
Uses
Theory 9 - The Internet & its Uses 1
, The Internet & World Wide Web
5.1.1, 5.1.2 & 5.1.3
The Internet
A global network of computers which is standardised using TCP/IP (a protocol which
allows networks to talk to each other.
📱 A protocol is a specific set of rules used for communication.
The World Wide Web
A set of interconnected web pages which contain text, images, videos, etc.
Hyperlinks allow web pages to link to each other.
Uniform Resource Locator
Allows access to a web page by typing the URL in.
Follows a specific format:
🖥 https://www.st-albans.herts.sch.uk/webpages/about.html is the example
used here.
https - protocol
st-albans.herts.sch.uk - domain
webpages - folder
about.html - web page
Advantages Disadvantages
Easy to remember & type Not the actual physical address
Name means something, geographic
Domain name server needs to be kept updated.
location usually indicated
The HTTP Protocol
Theory 9 - The Internet & its Uses 2
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