10 Questions
What is the primary reason why a signal loses energy as it travels through a medium?
The signal overcomes the resistance of the medium.
What is the unit of measurement used to show the relative strengths of two signals or one signal at two different points?
Decibel
What is the result of a signal being attenuated?
The signal loses energy.
What is the purpose of amplifiers in signal transmission?
To compensate for the loss of energy.
What is the formula to calculate the decibel (dB) of a signal?
dB = 10 Log10 (P2 / P1)
What is the meaning of a negative decibel (dB) value?
The signal is attenuated.
What is the result of a 3 dB loss of power in a signal?
The signal loses one-half of its power.
What is the unit of measurement used to define the loss in a cable?
Decibel per kilometer (dB/km)
What is the power of the signal at 5 km if the signal at the beginning of a cable has a power of 2 mW and the loss in the cable is -0.3 dB/km?
1.87 mW
What are the three causes of impairment in signal transmission?
Attenuation, distortion, and noise.
This quiz covers the specific responsibilities of the transport layer in a network, including end-to-end message delivery, service-point addressing, and segmentation and reassembly.
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