GCSE Computer Science
Computer systems and networks
revision.
What the CPU actually does, and how machines share data without chaos.
Computer systems and networks guides
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Students type: TCP/IP layers GCSE computer science
Open guide Revision guideVon Neumann architectureStudents type: Von Neumann architecture GCSE computer science
Open guide Revision guideThe fetch–decode–execute cycleStudents type: fetch decode execute cycle GCSE
Open guide Revision guideSystems architectureStudents type: fetch decode execute cycle gcse
Open guide Revision guideNetworksStudents type: lan vs wan gcse computer science
Open guideNetworks
LANs and WANs, hardware, topologies, protocols, DNS and the factors that make a network fast, reliable or neither.
Systems architecture
The CPU’s fetch–decode–execute cycle, what actually speeds a processor up, memory versus storage, and embedded systems.
The fetch–decode–execute cycle
GCSE Computer Science fetch–decode–execute: how the PC, MAR, MDR, CIR and ALU move one instruction from memory through the CPU, every cycle.
Von Neumann architecture
GCSE Computer Science Von Neumann architecture: stored program, shared memory for instructions and data, and the bottleneck that comes from one bus doing both jobs.
TCP/IP layers
GCSE Computer Science TCP/IP: application, transport, internet and network-access layers, what each one is for, and how a packet is passed down and back up the stack.
Keep going
More GCSE Computer Science
in the same style.
GCSE Computer Science revision for algorithms, programming, binary, networks, cyber security, systems architecture and Boolean logic — with trace tables, not hand-waving.
All Computer Science revision