Coaxial cable is commonly used in the cable television industry. This has also gained popularity in use for computer networks, such as Ethernet networks. Coaxial cable is highly resistant to signal interference and can support greater distance between network devices than twisted pair cable.
Coaxial cable consists of a single core copper wire surrounded by an insulator and enclosed in a copper mesh, finally covered inside an outside insulation. 
The Coaxial Cable consists of the following types:
RG (Radio Guide) 6: These are high quality and low transmission loss Cables generally used in areas where over-the-air signals may cause interference for Digital Cable and Satellite TV applications.
RG8: These cables are used in "10base5" "Ethernet" networks because of its great flexibility with low transmission losses.
RG58: RG58/U Coaxial Patch Cables are used for ThinNet.
RG59: RG59/U BNC Patch cables are used for video applications such as CCTV, home theatre, and much more.
The main features co-axial cable:
When compared to twist pair cable a coaxial cable can support greater cable lengths between network devices.
They are highly resistant to signal interference.
It costs less that other cables.
Not flexible and it is more difficult to terminate.
