# COMPUTER NETWORKING

## PHYSICAL LAYER AND TRANSMISSION MEDIA

### DATA AND SIGNALS

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
It is a relative measure of signal loss or gain and it is used to measure the logarithmic loss or gain of a signal.
 A Data Rate B Decibel C Data Rate D Baud Rate
Explanation:

Detailed explanation-1: -Denoted as a decibel (dB) loss. A relative measure of signal loss or gain and is used to measure logarithmic loss or gain of a signal. The process of sending data over a signal by varying either its amplitude, frequency or phase.

Detailed explanation-2: -What Is a Decibel? A decibel (dB) is a unit of measurement for sound. A-weighted decibels, abbreviated dBA, are an expression of the relative loudness of sounds in air as perceived by our ears.

Detailed explanation-3: -dB (Decibel) This is useful since signal strengths vary logarithmically, not linearly. Since the dB scale is a logarithmic measure, it produces in simple numbers for large-scale variations in signals. It is very useful because system gains and losses can be calculated by adding and subtracting whole numbers.

Detailed explanation-4: -Did you know: A logarithmic scale is used when there is a large range of quantities. It is based on orders of magnitude, rather than a standard linear scale, so each mark on the decibel scale is the previous mark multiplied by a value.

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