Question

Which of the following mediums is used for broadband local networks?
(A) Coaxial cable
(B) Optic fibre
(C) CATV
(D) UTP

Answer 1

Hint: A broadband network means a high-speed internet network. It will be faster than any traditional dial-up connection. There are different media through which high-speed internet can be transmitted. Depending on the media of transmission the speed and efficiency of the internet vary.

Complete Answer:
For the transmission of the broadband network, both coaxial cables and optic fibre cables can be used. But always optic fibre cable will be more efficient than coaxial cables. In optic fibre cables, the signals are converted into light signals and transmitted through a fibre made of glass or plastic. The light through total internal reflections travel through the fibre and reach the destination. At the destination, these light signals are again converted into electrical signals. In optic fibre transmission the loss of signals is very low compared to that of coaxial cables. Since the speed of light is very high compared to that of electrical signals the network speed will also be very high in optic fibre cables.
Therefore the best medium for broadband is optic fibre.
The answer is: Option (B): Optic fibre.

Additional information:
Coaxial cable is a type of electrical cable made up of copper. It is also used for the transmission of television signals and broadband networks to connect to satellite antenna networks. The fact that coaxial cables are bulky and expensive and the fact that interference can happen makes them less preferred over optic fibre cables.

Note:
CATV is called community antenna television, which is used for the transmission of television signals. A community antenna is used by this system to receive the television signals from the satellites. UTP stands for unshielded twisted pair cables. They are also used for computers and telecommunications.