search
Log In
2 votes
1.3k views

____ is a type of transmission impairment in which the signal looses strength due to the resistance of the transmission medium

  1. Attenuation
  2. Distortion
  3. Noise
  4. Decibel
in Computer Networks 1.3k views

1 Answer

1 vote
 
Best answer

Ans is A attenuation  

Attenuation is a general term that refers to any reduction in the strength of a signal.Attenuation occurs with any type of signal, whether digital or analog. Sometimes called loss, attenuation is a natural consequence of signal transmission over long distances

Distortion, in acoustics and electronics, any change in a signal that alters the basic waveform or the relationship between various frequency components; it is usually a degradation of the signal. Straight amplification or attenuation without alteration of the waveform is not usually considered to be distortion.

Noise is unwanted electrical or electromagnetic energy that degrades the quality of signals and data.  Noise occurs in digital and analog systems, and can affect files and communications of all types, including text, programs, images, audio, and telemetry.

The decibel (dB) is a logarithmic unit used to express the ratio of two values of a physical quantity, often power or intensity. One of these values is often a standard reference value, in which case the decibel is used to express the level of the other value relative to this reference


selected by
Answer:

Related questions

3 votes
1 answer
1
2.4k views
A client-server system uses a satellite network, with the satellite at a height of 40,000 kms. What is the best-case delay in response to a request? (Note that the speed of light in air is 3,00,000 km/second) 133.33 m sec 266.67 m sec 400.00 m sec 533.33 m sec
asked Jul 29, 2016 in Computer Networks jothee 2.4k views
2 votes
1 answer
2
3.9k views
What is the bit rate for transmitting uncompressed 800 $\times$ 600 pixel colour frames with 8 bits/pixel at 40 frames/second? 2.4 Mbps 15.36 Mbps 153.6 Mbps 1536 Mbps
asked Jul 29, 2016 in Computer Networks jothee 3.9k views
3 votes
2 answers
3
923 views
Possible thread states in Windows 2000 operating system include: Ready, running and waiting Ready, standby, running, waiting, transition and terminated Ready, running, waiting, transition and terminated Standby, running, waiting, transition and terminated
asked Jul 29, 2016 in Operating System jothee 923 views
2 votes
2 answers
4
951 views
Which of the following commands would return process_id of sleep command? Sleep 1 and echo $? Sleep 1 and echo $# Sleep 1 and echo $\$\times$ Sleep 1 and echo $!
asked Jul 29, 2016 in Operating System jothee 951 views
...