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Short lessons that explain one thing properly. Search for a word, or pick a subject and read it through from the basics.

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2 of 58 lessons about Hardware Show all lessons

Cloud computing

What the cloud is and how it works: service models, virtual machines, containers and serverless.

1 of 7 lessons shown

  1. What is a virtual machine? A virtual machine is a computer made of software, running on a physical one. What a hypervisor does, why businesses use them, and what to look after. Beginner 3 min read

Networks and business IT

The equipment in the comms cupboard and what it does: addresses, routers, firewalls, VLANs and VPNs.

1 of 6 lessons shown

  1. Router vs switch vs access point: what’s the difference? A router joins your office to the internet, a switch connects wired devices, and an access point provides Wi-Fi. How to tell which one you need. Intermediate 3 min read

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