Fundamentals
Bit, Byte & Unit Conversions
Bit, Byte & Kibi Basics
Databases
2 items
Electrical Units – Power, Voltage, Current, and Energy
The relationship between power (P), voltage (U), current (I), resistance (R), and electrical work/energy (W). Including the power triangle, Ohm's law, and kilowatt-hours.
Encryption and Digital Signatures
Overview of symmetric and asymmetric encryption, hash functions, and digital signatures.
JSON
JSON conventions: file naming, key naming, and comparison of JSON, JSONC, and JSON5
RAID
Overview of RAID levels and their trade-offs between performance, redundancy, and storage efficiency.
Regular Expressions
Overview of regular expression syntax, character classes, quantifiers, anchors, groups, lookaround, and common patterns.
IT Security Goals
The four core IT security goals, confidentiality, integrity, availability, authenticity, and what they mean in practice.
SI Prefixes
Common SI (metric) prefixes and their multipliers, from pico to tera, used to scale units like meters, grams, seconds, volts, watts, and hertz.
Subnetting (IPv4)
Subnetting Basics, Calculations & Examples (IPv4)
UML
2 items