Coaxial Cable is a type of wire that consists
of a center wire surrounded by insulation and then a grounded
shield of braided wire. The shield minimizes electrical and
radio frequency interference.
Coaxial cabling is the primary type of cabling used by the cable
television industry and is also widely used for computer
networks, such as Ethernet. Although more expensive than
standard telephone wire, it is much less susceptible to
interference and can carry much more data.
Why coaxial cable is called coaxial cable?
The term coaxial comes from the inner conductor and the outer
shield sharing ("co-") the same axis. It is often used as a
high-frequency transmission line to carry a high-frequency or
broadband signal but may also be used for frequencies as low as
audio frequency.