Chapter 5 study guide 233

Chapter 5 study guide 233 - Chapter 5 Define the concept of...

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Chapter 5 Define the concept of propagation and explain how it impacts signaling.- Propagation- the traveling of a signal down a transmission medium If propagation effects are too large, the receiver cannot read the signal How do propagation effects differ based on the type of media used. Explain the following propagation effects: Attenuation- weakened Distortion- shape has been changed Interference- unwanted external electromagnetic energy coming from electrical motors, fluorescent lights. What is noise? What is the signal-to-noise ratio? Random electromagnetic energy. SNR- The ratio of the signal strength to average noise strength; should be high in order for the signal to be effectively received. Longer propagation distances result in lower SNR therefore more noise errors. What are the three major types of media used on todays computer networks? Briefly explain their advantages and disadvantages of each one. UTP Wiring, optical fiber and coaxial cable UTP- four wire pairs with a RJ-45 connector to each end. It is rugged and inexpensive so it dominates the market. Optical Fiber- transceiver sends a signal into a thin glass. Better than UTP for
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Chapter 5 study guide 233 - Chapter 5 Define the concept of...

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