Section 1
IT Fundamentals
Preview
Preview: IT Concepts
- 4 of 27 lesson topics
- 1 overview segment
- 3 core concepts
- 2 exam tips
Lesson Topics
- Persistent Storage in a Workflow
- Hexadecimal Numbering
- Network Throughput Measurements
- Troubleshooting: test the theory
Overview
The exam tests fundamental IT concepts essential for understanding how systems operate and how to troubleshoot common issues. It covers data storage, network performance, data quality, and responsible data handling – all critical for IT professionals.
Core Concepts
- **Persistent Storage:** Data storage that retains information even when power is removed. SSDs (Solid State Drives) are a common example of persistent storage, contrasting with volatile memory (RAM) which loses data when power is lost.
- **Hexadecimal Numbering (Base-16):** A numbering system using 16 symbols (0-9 and A-F) to represent values compactly. It's frequently used in programming, networking, and color codes (e.g., #FF0000 for red).
- **Network Throughput:** The rate at which data is transferred across a network, typically measured in bits per second (bps), kilobits per second (kbps), megabits per second (Mbps), or gigabits per second (Gbps).
Exam Tips
- Pay close attention to units of measurement (bps, kbps, Mbps, Gbps) and understand what they represent.
- When troubleshooting, always test your hypothesis before implementing a fix. Don't guess!