PHYSICAL LAYER AND TRANSMISSION MEDIA
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The two strands allow the data to travel for longer distances without degrading.
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They increase the speed at which the data can travel.
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They prevent crosstalk from causing interference on the connection.
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They allow for full-duplex connectivity.
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Detailed explanation-1: -Why are two strands of fiber used for a single fiber optic connection? The two strands allow the data to travel for longer distances without degrading. They prevent crosstalk from causing interference on the connection.
Detailed explanation-2: -Single strand fiber allows the user to simultaneously send and receive data on one strand of fiber. It provides full duplex operation without the cost of a secondary fiber cable. For a majority of optical networks a pair of fibers is required to achieve full duplex operation.
Detailed explanation-3: -Traditional fiber optic connections required two fiber strands – one strand to transmit data and another to receive data.
Detailed explanation-4: -Overview. Dual fiber uses the same wavelength on two fiber strands; one for transmit, and one for receive. Single-fiber operates with bi-directional wavelengths, often referred to as BIDI. Typically BIDI single-fiber uses 1310nm and 1550nm wavelengths over the same fiber strand in opposite directions.