COMPUTER NETWORKING

PHYSICAL LAYER AND TRANSMISSION MEDIA

TRANSMISSION MEDIA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Digital signals consist of binary digits ____
A
0&1
B
2&3
C
8&16
D
9&0
Explanation: 

Detailed explanation-1: -Most digital signals are binary; that is, they signal the digits 0 and 1 by shifting between two distinct physical states (e.g., a high voltage and a low voltage). Each 0 or 1 is a bit (binary digit).

Detailed explanation-2: -In digital circuits, binary bit values of 0 and 1 are represented by voltage signals measured in reference to a common circuit point called ground. The absence of voltage represents a binary “0” and the presence of full DC supply voltage represents a binary “1.”

Detailed explanation-3: -Data is encoded using binary code consisting of 0s and 1s. The 1 in binary code represents true or ‘on, ‘ whereas the 0 represents false or ‘off. ‘ The code instructs computers to transmit digital signals in electronic impulses, and combinations of 0 and 1 will produce different commands for the computer.

Detailed explanation-4: -In a digital system, binary values of 0 and 1 are given a voltage level so they can be distinguished during the flow of information. Most commonly, a value of 1 is represented by 5V, whereas, a binary value of 0 is given 0V or ground potential.

There is 1 question to complete.