This visual Sinhala-language poster clearly explains network cables and signal transmission media used in computer networks. Perfect for G.C.E. O/L and A/L ICT lessons, classroom displays, and digital learning materials.
🧾 Poster Topics Covered:
🧵 Twisted Pair Cables (TP):
- UTP (Unshielded Twisted Pair)
- STP (Shielded Twisted Pair)
- Minimizes signal interference (RFI/EMI)
- Widely used in LAN networks
🔌 RJ45 Connector:
- Used with TP cables
- Standard Ethernet port connector
📡 Coaxial Cable:
- Contains:
- Center core
- Insulating layer
- Metallic shield
- Outer cover
- Good resistance to EMI/RFI
- Used in early LANs, cable TV
💡 Fiber Optic Cable:
- Transmits data via light signals
- Extremely high speed
- Immune to RFI/EMI
- Used in modern backbone networks
📡 Wireless Media:
- Describes signal transmission without physical cables
- Examples:
- Infrared remote (TV)
- Satellite communication
- Radio & mobile transmission
- Wireless internet towers
🖼️ Image Size:
- Dimensions: 1000 x 4000 pixels
🧾 Approximate Print Size:
| DPI | Width (in) | Height (in) | Width (ft) | Height (ft) |
|---|---|---|---|---|
| 300 | 3.33 in | 13.3 in | 0.28 ft | 1.11 ft |
| 150 | 6.67 in | 26.7 in | 0.56 ft | 2.22 ft |
| 72 | 13.9 in | 55.6 in | 1.15 ft | 4.63 ft |
🖨️ Suitable for long vertical wall posters or infographics in school labs.
🎨 Format & Customization:
- File Format: PNG
- ✅ Can be edited using:
- Adobe Fireworks
- Photoshop
- GIMP
- Canva or Photopea
- ✅ Customizable for:
- Font edits
- Color themes
- Adding logos/school names
🎯 Best For:
- ICT teachers
- Computer hardware lessons
- Grade 10–13 students
- School ICT labs