Study Notes for CSS NC2 Competency and Computer Systems
CSS NC2 Competency
Enrolled: Grade 12 Galileo
Wiring Voltage Codes:
RED: +5V
YELLOW: +12V
ORANGE: +3.3V
BLACK: Ground
Competency Categories
Basic Competencies:
Workplace communication
Teamwork
Career professionalism
Occupational health and safety
Common Competencies:
Quality standards
Computer operations
Mensuration/calculation
Technical drawing
Hand tools
Electrical wiring/circuits
Testing components
Core Competencies:
Install/configure computer systems
Set up networks/servers
Maintain/repair systems/nets
Computer Components
Central Processing Unit (CPU): Executes instructions and calculations
Motherboard: Main circuit board; connects components; contains BIOS/UEFI
RAM: Volatile memory; temporary data storage
ROM: Non-volatile; permanent data storage; BIOS storage
HDD vs SSD:
HDD: Spinning disks; lower cost
SSD: Flash memory; faster; higher cost
Power Supply Unit (PSU)
Converts AC to DC for computer use
CMOS Battery: Powers CMOS chip for system info storage
Graphics and Cooling
Graphic Processing Unit (GPU): Renders graphics; essential for multimedia
Cooling Systems: Maintain stable temperatures via fans, heat sinks, or liquid cooling
Computer Case/Chassis
Houses/protects components; aids cooling and airflow
Networking Components
Network Interface Card (NIC): Connects computer to network
Sound Card: Provides audio processing beyond onboard audio
Input Devices: Keyboard/mouse, convert actions to digital
Output Devices: Monitor/print/display results
Peripheral Devices
External components enhancing functionality—USB drives, external HDDs, etc.
CSS Tools & Functions
Crimping Tool: Joins wires/connectors
Wire Strippers/Cutters: Insulation removal/cutting wires
Punch Down Tool/RJ45 Connector: Network installation
LAN Cable: Provides wired connectivity
LAN Cable Tester: Checks integrity and errors
Occupational Health and Safety
Importance: Protects workers; safety compliance
Key Policies:
PPE usage
Electrical safety
Static precautions
Safe component handling
Ergonomics
Emergency preparedness
Installing & Configuring Systems
Essential tools: screwdrivers, anti-static wrist strap, thermal paste
Using a computer: Proper startup, navigation, and shutdown procedures
Operating System (OS) Installation
Roles of OS: Manages hardware, software, user interface
Requirements: CPU, RAM, storage
Testing & Troubleshooting
Purpose of Testing: Verify functionality, compatibility
Tools: Diagnostic software, hardware tools
Preparing Bootable Installers
Using Rufus: Steps to create a bootable USB flash drive
Other command-line methods for creating install media
General Networking Concepts
Protocols: DHCP, FTP, etc.
Networking Devices: Routers, switches, firewalls
Security Measures: Authentication methods, antivirus, firewalls