Communication Systems Bandwidth Transmission Medium — Test 1

Correct Answer: C. C. Few hundreds of khz to a few ghz
Explanation: Communication through free space using radio waves takes place over a very wide range of frequencies, i.e. from a few hundreds of Hz to a few kHz. This range of frequencies is further subdivided and allocated for various services.

Correct Answer: B. B. Microwaves to ultraviolet
Explanation: Optical communication which is also called optical telecommunication is referring to a type of communication at a distance using light to carry information. Optical communication using fibers is performed in the frequency range of 1 THz to 1000 THz, i.e. microwaves to ultraviolet.

Correct Answer: A. A. True
Explanation: Yes, this is a true statement. The bandwidth of optic fiber is high due to the speed with which data can be transmitted and also the range of frequencies over which the data can travel without any attenuation. An optical fiber can offer a transmission bandwidth in excess of 100 GHz.

Correct Answer: D. D. International telecommunication union
Explanation: The expansion of ITU is the International Telecommunication Union. It is a specialized agency of the United Nations that is responsible for all the matters related to information and communication technologies. The ITU administers the present system of frequency allocations