Coaxial cables are a popular choice because their shielded design allows the centre conductor to transmit data quickly while being protected from damage and interference.

Coaxial cables are mainly built up of these four different layers:

1.   A centre conductor which is usually a copper wire, which data and video travels through

2.   Surrounding the copper wire is a dielectric plastic insulator

3.   A braided mesh made from copper then helps to shield the cable from electromagnetic interference (EMI)

4.  The external layer is a plastic coating which protects the internal layers from damage