PHYSICAL LAYER AND TRANSMISSION MEDIA
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Ethernet, a common LAN technology, uses Manchester encoding. Manchester encoding is a special type of bipolar signaling in which the signal is changed from high to low or from low to high in the middle of the signal.
Detailed explanation-2: -Although single-mode optical fiber holds advantages in terms of bandwidth and reach for longer distances, multimode optical fiber easily supports most distances required for enterprise and data center networks, at a cost significantly less than single-mode.
Detailed explanation-3: -Propagation delay is negligible with satellite transmission. One form of interference with satellite transmission is called raindrop attenuation in which the transmissions are absorbed by heavy rain. Fiber optic cable can only be used on LANs. Radio, microwave and satellite are all examples of guided media.