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Questions and Answers
What is the primary medium used for transmissions in fiber-optic cables?
How are data bits represented in fiber-optic cables?
What is a key advantage of fiber-optic cables over copper?
How many glass fibers are used in each fiber-optic circuit for networking?
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What type of pulses are used to transmit information through fiber-optic circuits?
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What device produces the light used in fiber-optic transmission?
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What happens to incoming light in a fiber-optic cable?
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What is the function of the transmitter in a fiber-optic circuit?
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What is the role of the receiver in a fiber-optic circuit?
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How is data represented in fiber-optic transmission?
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What is the material used for the thin strands in fiber-optic cables?
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Why is fiber-optic cable not susceptible to EMI or RFI?
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What is the core diameter of a standard multimode fiber-optic cable?
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What is the main difference between single-mode and multimode fiber-optic cables?
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What is the core diameter of a standard single-mode fiber-optic cable?
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What is the advantage of using single-mode fiber-optic cables for exterior segments and connecting buildings in larger campus environments?
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What is the feature of fiber-optics that makes it difficult to remotely detect the signal being transmitted within the cable?
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What is the disadvantage of fiber-optics compared to copper cables?
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What is the main reason that single-mode fiber-optic cables can transmit data further than multimode?
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What is the type of glass used in multimode fiber-optic cables that causes the light to slow down when passing through the center of the core?
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What is the approximate bandwidth of the fiber circuits used in trunk connections between cities and countries?
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What is the main reason that fiber-optics are less forgiving of abuse than copper cable?
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What is the main reason that single-mode fiber-optic cables require a higher level of safety awareness?
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What is the main reason that fiber-optics are not subject to EMI, RFI, or voltage surges?
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Study Notes
Fiber-Optic Cables
- The primary medium used for transmissions in fiber-optic cables is light.
- Data bits are represented in fiber-optic cables as on/off pulses of light, where the presence of light represents a 1 and the absence of light represents a 0.
- A key advantage of fiber-optic cables over copper is that they are not susceptible to electromagnetic interference (EMI) or radio-frequency interference (RFI).
Fiber Structure
- Each fiber-optic circuit for networking uses one glass fiber.
- The thin strands in fiber-optic cables are made of glass or plastic.
Light Transmission
- Light pulses are used to transmit information through fiber-optic circuits.
- A laser diode or light-emitting diode (LED) produces the light used in fiber-optic transmission.
- Incoming light in a fiber-optic cable is focused onto the core of the fiber.
Transmitter and Receiver
- The transmitter in a fiber-optic circuit converts electrical signals into light signals.
- The receiver in a fiber-optic circuit converts light signals back into electrical signals.
Data Representation
- Data is represented in fiber-optic transmission as light pulses, where the presence or absence of light corresponds to 1s and 0s.
Fiber-Optic Cable Properties
- Fiber-optic cables are not susceptible to EMI or RFI because the signal is transmitted as light, which is not affected by electromagnetic fields.
- The core diameter of a standard multimode fiber-optic cable is 50-100 micrometers.
- The core diameter of a standard single-mode fiber-optic cable is 8-10 micrometers.
Single-Mode vs Multimode
- The main difference between single-mode and multimode fiber-optic cables is the diameter of the core, with single-mode cables having a smaller core diameter.
- Single-mode fiber-optic cables can transmit data further than multimode cables due to less signal dispersion.
Security
- Fiber-optic cables have a feature that makes it difficult to remotely detect the signal being transmitted within the cable, making it a secure transmission method.
Disadvantages
- A disadvantage of fiber-optics compared to copper cables is that fiber-optics are more fragile and require more care when handling.
- Fiber-optics are less forgiving of abuse than copper cables due to their fragility.
Safety
- Single-mode fiber-optic cables require a higher level of safety awareness due to the higher power density of the laser used.
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Description
Test your knowledge of fiber optic cables with this quiz! Learn about the transmission of data using modulated light through thin glass strands, the advantages of fiber over traditional cables, and its resistance to electromagnetic and radio frequency interference.
