Teach Computing

Revision notes, activities, lesson plans, teaching ideas, and other resources for GCSE, A-Level, and IB Computer Science teachers and students.

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CommandPoint CAD

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CAD+911 System

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London Ambulance CAD failure

The 1992 London Ambulance Service CAD failure is probably the most notoriou...

Washington State 911 Failure

A 911 emergency telephone system in Washington State and Oregon shut down f...

London ambulance failure (2017)

A 2017 failure of a London ambulance dispatch system is believed to have le...

Computer Aided Dispatch outage

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Load balancing videos

This short article and the associated video explain 5 load balancing algori...

Intergraph Computer-Aided Dispatch (I/CAD

Intergraph Computer-Aided Dispatch (I/CAD) is a system offering many of the...

Boolean logic worksheet pack

These three Boolean logic worksheets have exam style questions on logic sta...

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TCP / IP

Click here for recommended AQA A-Level Computer Science textbooks.

4.9.4.1 TCP/IP

4.9.4.2 Standard Application Layer Protocols

4.9.4.3 IP Address Structure

4.9.4.4 Subnet Masking

4.9.4.5 IP Standards

4.9.4.6 Public and Private IP Addresses

4.9.4.7 DHCP

4.9.4.8 Network Address Translation (NAT)

Network Address Translation (NAT)

Network Address Translation

This video does a good job of explaining quite a complex topic - the idea of Network Address Translation (NAT) and public and private IP addresses. Examples include how a university would support multiple computers and how a home network support multiple devices on a single IP address.


Updated: 2015-05-27

4.9.4.9 Port Forwarding

4.9.4.10 Client Server model

4.9.4.11 Thin vs Thick Client Computing