My notes on the Cloud Computing Fundamentals room — why the cloud exists, public vs private vs hybrid, the IaaS/PaaS/SaaS responsibility ladder, and why security work leans towards IaaS.

My notes on the Virtualisation Basics room — the building analogy, VMs vs containers, Type 1 vs Type 2 hypervisors, and why a VM is the safe place to run malware you don't trust.

My notes on the Client-Server Basics room — the client-server model, request and response, ports, DNS, and HTTP GET, mapped through the pizza-takeaway analogy.

My notes on the Cryptography Concepts room — plaintext vs ciphertext, symmetric vs asymmetric encryption, certificates, and how they combine to power HTTPS.

My notes on the CIA Triad room — confidentiality, integrity, availability, and the real mechanism that defends each one.

My notes on the Intro to LAN room — network topologies, subnetting as a security boundary, ARP, DHCP, and the pattern I keep meeting: identity without verification is not security.

My notes on the Data Encoding room — ASCII, Unicode, and UTF-8/16/32, and why an encoding mismatch is both the cause of gibberish text and a real security surface.

My notes on the Data Representation room — binary, hex and RGB colour, and why hexadecimal is really just the actual bytes made legible, which is exactly why security tools speak it.

My notes on the Windows Basics room — read not as a beginner's tour but as an inventory of the security controls Windows already ships with, and how they map to the OS duties from the previous room.

My notes on the Operating Systems Introduction room — the OS as an air-traffic controller, the kernel/user-space privilege boundary, and why the OS is a security layer before any security tool is installed.