PHYSICAL LAYER AND TRANSMISSION MEDIA
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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multi-mode
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single-mode
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Either A or B
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None of the above
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Detailed explanation-1: -Singlemode fibre has a much smaller core size of 9 microns and has a single light path and can travel much longer distances of up to 100km. These require more expensive electronics which operate in the 1310 and 1550nm windows and are typically used in longer distance LAN’s, Cable TV and telephony applications.
Detailed explanation-2: -Single Mode Fiber Optic Cable This application is typically used in long distance, higher bandwidth runs by Telcos, CATV companies, and Colleges and Universities. Left: Single Mode fiber is usually 9/125 in construction. This means that the core to cladding diameter ratio is 9 microns to 125 microns.
Detailed explanation-3: -Single-mode fiber uses more expensive lasers and optical glass. Single-mode communication is right down the center of the glass fiber, never bouncing (thus single mode). Single-mode fiber can stand higher power and thus yields longer distances.
Detailed explanation-4: -Optical fiber is used by telecommunications companies to transmit telephone signals, Internet communication and cable television signals. Due to lower attenuation and interference, optical fiber has advantages over copper wire in long-distance, high-bandwidth applications. More items