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Brainlag Learn / GCSE Computer Science

Networks and protocols

LANs, WANs and PANs, network hardware, star, mesh and bus topologies, the internet and DNS, IP and MAC addresses, protocols and layers, network security, and transfer time calculations.

Lessons

  1. Networks and network hardwareLANs and WANs, client-server and peer-to-peer, the hardware that joins devices together, wired and wireless, and what slows a network down. 20 min, free
  2. Topologies and the internetStar, mesh and bus topologies, the internet, DNS, hosting and the cloud, and the IP and MAC addresses that identify devices. 25 min, free
  3. Protocols, layers and packetsWhat each common protocol does, the four-layer TCP/IP model, how packet switching moves data across the internet, PANs, and how a network is kept secure. 25 min, Plus
  4. Network calculationsTransfer times from file size and bandwidth, bits against bytes, shared bandwidth, latency and packet counts. 20 min, Plus

Practise and test

AQA, Pearson Edexcel and OCR are registered trade marks of their owners. Brainlag Learn is independent: it is not affiliated with or endorsed by any exam board, and every question on it is original.