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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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17 of 58 lessons about Cloud Show all lessons

Data security and encryption

How data is kept unreadable to anyone who should not see it: encryption, certificates, TLS and hashing.

1 of 8 lessons shown

  1. Encryption at rest vs encryption in transit Data can be encrypted where it is stored and while it travels. What each one protects against, where each stops, and why you need both. Intermediate 3 min read

Backups and disaster recovery

Keeping a copy you can get back: the 3-2-1 rule, the kinds of backup, and backup against archive.

1 of 4 lessons shown

  1. What is cloud backup? Cloud backup keeps a copy of your data with a provider over the internet. How it works, and why Microsoft 365 or Google Workspace is not one. Beginner 3 min read

Cloud computing

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

7 lessons

  1. What is cloud computing? Cloud computing means renting computing over the internet instead of owning it. The five features that define it, and what they mean for a small business. Beginner 3 min read
  2. How cloud computing works What sits behind a cloud service: data centres and regions, virtualisation, a meter on what you use, and security duties shared with the provider. Intermediate 3 min read
  3. Public cloud vs private cloud vs hybrid cloud Public, private and hybrid describe who a cloud is built for. What each one means, how they really differ, and how a small business can choose. Intermediate 3 min read
  4. What is software as a service (SaaS)? SaaS is software the provider runs for you and you use over the internet. What the provider looks after, what stays with you, and what to ask before signing up. Beginner 3 min read
  5. 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
  6. What is a container? A container packages one application with the files it needs. How it differs from a virtual machine, why developers use containers, and what to ask about yours. Intermediate 3 min read
  7. What is serverless computing? Serverless means the cloud provider runs the servers and you pay only when your code runs. How it works, where it fits, and what to ask a developer. Intermediate 3 min read

Cloud platforms and storage

The three big platforms side by side, and the kinds of storage they sell.

6 lessons

  1. What is Amazon Web Services (AWS)? AWS is Amazon’s cloud platform. What it rents out, where its Australian data centres are, how it charges and which security jobs stay with you. Beginner 3 min read
  2. What is Microsoft Azure? Azure is Microsoft’s cloud platform. What it rents out, where its Australian data centres are, how it charges and which security jobs stay with you. Beginner 3 min read
  3. What is Google Cloud Platform (GCP)? Google Cloud is Google’s cloud platform. What it rents out, where its Australian data centres are, how it charges and which security jobs stay with you. Beginner 3 min read
  4. AWS vs Azure vs Google Cloud: what’s the difference? The three big cloud platforms rent out much the same things. What they share, the differences a small business would notice, and how the choice is made. Intermediate 3 min read
  5. What is cloud storage? Cloud storage keeps your files on a provider’s equipment and delivers them over the internet. Where the data lives, how safe it is and who can read it. Beginner 3 min read
  6. Object storage vs block storage vs file storage Cloud providers sell three kinds of storage. How object, block and file storage each hold data, what each is used for and which one a job needs. Intermediate 3 min read

Websites, hosting and domains

What happens between typing an address and seeing a page: domains, DNS, hosting, HTTPS and CDNs.

2 of 9 lessons shown

  1. What is web hosting? Web hosting is the service that keeps your website on a server and delivers it to visitors. The main kinds, and what to ask a host. Beginner 3 min read
  2. What is a content delivery network (CDN)? A CDN keeps copies of your website on servers in many places, so each visitor is served from one nearby. What it speeds up and what it cannot. Intermediate 3 min read

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