What's a subnet?

What's a subnet?

Let's go back to the hotel analogy and look what what subnets are, and how they can reduce network congestion.

Networking Terminology

Why do numbers in IPv4 addresses only go up to 255?

Why do numbers in IPv4 addresses only go up to 255?

Why don't we ever see 10.999.999.999? Here's an introduction to the mathematics behind the scenes.

Mathematics Networking

IP addresses and CIDR blocks, basically

IP addresses and CIDR blocks, basically

An introduction to IP addresses and CIDR blocks, with hotel rooms and binary numbers.

Mathematics Networking Terminology

What are VPCs?

What are VPCs?

If you've ever used Amazon Web Services then you've probably seen one already -- but what is a VPC?

Amazon Web Services Networking Terminology

Infrastructure as Code and Flying to the Moon

Infrastructure as Code and Flying to the Moon

What can we learn from Apollo-era space rockets and apply to infrastructure as code today?

Infrastructure as Code

Authentication vs Authorisation

Authentication vs Authorisation

What's the difference between authorisation and authentication? Does it really matter? (SPOILER: Yes, it does.)

Security Terminology