🌐 Introduction to Computer Networking
Computer networking is the backbone of today’s digital world. In Papua New Guinea (PNG), networking plays a critical role in education, banking, communication, and business operations.
A computer network is a group of connected devices (computers, phones, servers) that share resources like internet, files, and printers.
📌 Why Networking is Important in PNG
- Supports online learning and training institutions
- Enables mobile banking and digital payments
- Connects rural and urban communities
- Powers government and business systems
🖧 Types of Computer Networks
1. LAN (Local Area Network)
A LAN connects computers within a small area such as:
- Schools in Goroka
- Offices in Port Moresby
- Computer labs
2. WAN (Wide Area Network)
A WAN connects large areas across provinces or countries.
👉 Example: Internet access across Papua New Guinea
3. MAN (Metropolitan Area Network)
Used within cities like:
- Lae
- Port Moresby
🔌 Network Devices Explained
Device| Function
Router| Connects your network to the internet
Switch| Connects multiple devices in a LAN
Modem| Connects to ISP (Digicel, Telikom)
Access Point| Provides Wi-Fi
Firewall| Protects your network
🔄 Network Topologies
A topology is how devices are connected.
Common Types:
- Star Topology ⭐ (Recommended in PNG)
- Bus Topology
- Ring Topology
- Mesh Topology
👉 Best for PNG Schools: Star topology (easy to manage and expand)
🇵🇬 Internet and Networking in Papua New Guinea
Major Internet Providers:
- Digicel PNG
- Telikom PNG
- DataCo PNG
Challenges in PNG:
- Limited rural internet access
- High cost of data
- Power interruptions
Opportunities:
- Growth of online education
- Digital business expansion
- Government ICT transformation
🔢 Understanding IP Addressing & DNS
What is an IP Address?
An IP address is a unique number assigned to every device.
Example:
192.168.1.1
Types of IP Addresses:
- Private IP (used in schools/offices)
- Public IP (used on the internet)
What is DNS?
DNS converts website names into IP addresses.
👉 Example: google.com → IP address
📚 Networking Models (OSI & TCP/IP)
OSI Model (7 Layers)
1. Physical
2. Data Link
3. Network
4. Transport
5. Session
6. Presentation
7. Application
TCP/IP Model (4 Layers)
- Network Interface
- Internet
- Transport
- Application
🔐 Network Security Basics in PNG
Common Threats:
- Mobile money scams
- Phishing emails
- Virus-infected USB drives
How to Stay Safe:
- Use strong passwords
- Install antivirus software
- Enable firewall protection
- Avoid public unsecured Wi-Fi
📡 Wireless Networking (Wi-Fi & Mobile Data)
Types:
- Wi-Fi networks
- Mobile internet (3G, 4G, 5G)
Usage in PNG:
- Home routers
- Digicel mobile data
Safety Tips:
- Use strong Wi-Fi passwords
- Avoid connecting to unknown networks
🛠️ Practical Network Setup (Step-by-Step)
Basic School or Office Setup:
1. Connect modem to internet source
2. Connect router to modem
3. Connect switch to router
4. Connect computers using Ethernet cables
5. Configure IP addresses
Tools Required:
- Ethernet cables
- Router & switch
- Crimping tool
🧰 Troubleshooting Common Network Problems
Problems & Solutions:
No Internet
- Restart router
- Check cables
Slow Speed
- Limit users
- Upgrade data plan
Connection Error
- Check IP settings
- Contact ISP
💼 Networking Careers in Papua New Guinea
Job Opportunities:
- IT Technician
- Network Administrator
- Cybersecurity Specialist
- ISP Technician
Where to Work:
- Schools and training institutions
- Banks (BSP, Kina Bank)
- Telecom companies
- Government departments
🎓 Conclusion
Computer networking is a vital skill for Papua New Guinea’s future. Whether you are a student, teacher, or business owner, understanding networking can open doors to new opportunities in the digital world.
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Published by PNG Computech Training Institution
2 comments:
Nice to learn from distance
Thanks Alex. You will be accommodated well. Thanks
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