1. Transmision Media

Copper
Fibre
Air
Electromagnetic waves
- •Radio waves
- •Microwaves
- •Infrared
- •Laser light (including visible light)
Electric charge
2. Electric Network

In rare cases, aluminium, platinum or gold can be used instead of copper

In power cords, the amount of electricity is determined by how much the appliance requires

4. Electric Cables
5.Coaxial Cables
6.Unshielded Twisted Pair Cable
7. Electromagnetik Network
8. Airwave Transmision
etc.
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