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: -3. Which of the following fiber-optic cable types use lasers in a single stream as a data light source transmitter? Explanation: Single-mode fiber uses laser technology as the light source.
Detailed explanation-2: -The Single Mode. The light source of the single-mode fiber is laser light that travels in a straight path down the narrow core, which makes it ideal for long-distance transmission; also the core size is so small that bouncing of light waves is almost eliminated.
Detailed explanation-3: -Single-mode fiber optic cables are designed to carry a single beam of light, which is a “mode.” These cables use lasers operating at 1310 to 1550 nm wavelength as a light source and are typically used in long-distance telecommunication applications.