Question

What is the commonly used unit for measuring the speed of data transmission?
A. $\text{Nano}\text{Second}$
B. $\text{Mega}\text{Hertz}$
C. $\text{Characters}\text{per}\text{second}$
D. $\text{Byte}\text{per}\text{second}$
E. $\text{Bits}\text{per}\text{second}$

Answer 1

Hint:Data transmission is the transfer of data from one device to another and the speed with which data is getting transmitted in computers is called data transmission speed. This speed must have some unit to measure.

Complete answer:
Data Transmission:It refers to the process of transferring data between two or more digital devices. In this transmission data is transmitted from one device to another in analog or digital format. This transfer occurs via point-to-point data streams or channels. Data transmission, sending and receiving data via cable or wireless systems.

Examples of such type channels are: Copper wires, optical fibers, wireless communication channels, storage media and computer buses.
Data Transmission are of two types:
-Parallel Transmission
-Series Transmission

Data is transferred in the form of bits between two or more digital devices. The above two types are used to transmit data between digital devices. Serial data transmission is those which sends data bit after another over a single channel while parallel data transmission sends multiple data bits at the same time over multiple channels.Hence this type of transmission is commonly measured in bits per second.

Therefore, the correct option is E.

Note:It is also measured in megabits per second which is also known as million bits per second denoted as $Mbps$ .Baud is also another unit's name for data transmission.Need to learn all different units of data transmission or else you will get confused because sometimes only one unit is given in the option which you don’t know and it becomes difficult for you to answer.