Optical Fiber Communication Fundamentals Quiz
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Questions and Answers

What is the main principle that allows optical fibers to transmit light signals effectively?

  • Reflection of light on the fiber surface
  • Refraction of light within the fiber core (correct)
  • Scattering of light along the fiber length
  • Absorption of light by the fiber material

    • Which technology provides a high-speed and efficient way of transporting data over optical networks?

  • MLLN (Multi-Link Line Networking)
  • Terrestrial Radio Links
  • DWDM Technology (correct)
  • FTTH Technology

    • What is the purpose of CPAN (Carrier Packet Access Network) technology in telecommunications?

  • Integration of multiple service types into a unified network (correct)
  • Data encryption for secure communication
  • Signal fault detection
  • Amplification of optical signals

    • In the context of optical communication, what does SDH (Synchronous Digital Hierarchy) primarily focus on?

    <p>Efficient transmission of data over optical fibers</p> Signup and view all the answers

    What is one of the key benefits of OTN (Optical Transport Network) technology in modern telecommunications?

    <p>Efficient grooming and switching of optical traffic</p> Signup and view all the answers

    What is a significant advantage of DWDM (Dense Wavelength Division Multiplexing) technology compared to traditional optical networking methods?

    <p>Multiplexing multiple signals over a single fiber</p> Signup and view all the answers

    What is the main role of the timer in an OTDR system?

    <p>Producing a voltage pulse to start the timing process</p> Signup and view all the answers

    What is the purpose of the directive coupler in an OTDR system?

    <p>Allowing laser light to pass through into the fiber under test</p> Signup and view all the answers

    Why does the electrical signal from the APD in an OTDR system require amplification?

    <p>Because it is very weak</p> Signup and view all the answers

    What kind of display is typically used in an OTDR system to present the returned signals?

    <p>CRT like an oscilloscope</p> Signup and view all the answers

    What happens when backscatter from the fiber approaches the directive coupler in an OTDR system?

    <p>It reflects into the avalanche photodiode (APD)</p> Signup and view all the answers

    Why is the ‗on‘ time or pulsewidth of the laser in an OTDR system between 1ns and 10us?

    <p>To suit the system to be investigated</p> Signup and view all the answers

    What is the main purpose of G.653 compliant dispersion shifted fiber?

    <p>Minimizing dispersion at 1550nm</p> Signup and view all the answers

    What is a key characteristic of G.654 compliant cut-off shifted fiber?

    <p>Low attenuation at 1550nm</p> Signup and view all the answers

    What was a drawback of G.653 compliant dispersion shifted fiber?

    <p>Non-linear effects in transmission</p> Signup and view all the answers

    Which type of fiber is known for extremely low attenuation at 1550nm and is suitable for long spans without repeaters?

    <p>G.654 compliant fiber</p> Signup and view all the answers

    What issue faced by G.653 fibers was successfully addressed by G.655 non-zero dispersion shifted fibers?

    <p>Non-linear effects at 1550nm</p> Signup and view all the answers

    Which ITU-T compliant fiber is specifically designed for WDM applications in the mid-1990s?

    <p>G.655 compliant fiber</p> Signup and view all the answers

    Which type of optical fiber is designed to utilize the low attenuation window of 1550nm?

    <p>ITU-T G.655 Compliant Non-zero dispersion shifted fiber</p> Signup and view all the answers

    What is the main issue caused by utilizing G.653 fibers in optical transmission?

    <p>Non-linear effects in transmission</p> Signup and view all the answers

    Which optical fiber type is known for having extremely low attenuation at 1550nm and is suitable for long spans without repeaters?

    <p>ITU-T G.654 Compliant Cut-off Shifted fiber</p> Signup and view all the answers

    What is the abbreviation NZDSF stands for in the context of optical fibers?

    <p>Non-zero dispersion shifted fiber</p> Signup and view all the answers

    What technology focuses on providing a high-speed and efficient way of transporting data over optical networks?

    <p>OTN (Optical Transport Network)</p> Signup and view all the answers

    What is a major factor that led to the thrust in the use of optical fibre as a transmission media?

    <p>Immunity to electro-magnetic interference</p> Signup and view all the answers

    In the context of network convergence, what is the technology that the access network is converging with?

    <p>IP &amp; MPLS technologies</p> Signup and view all the answers

    What type of multiplexing technology is migrating from TDM and FDM to packet-based statistical multiplexing in modern networks?

    <p>Time-Division Multiplexing (TDM)</p> Signup and view all the answers

    What kind of capabilities do modern client terminals have, according to the text?

    <p>Voice, video, text, web, and multimedia</p> Signup and view all the answers

    In the context of telecommunications, what does CPAN (Carrier Packet Access Network) technology primarily focus on?

    <p>Packet-based access networks</p> Signup and view all the answers

    What is the main focus of SDH (Synchronous Digital Hierarchy) technology?

    <p>Synchronization and multiplexing of digital signals over optical networks</p> Signup and view all the answers

    In the context of optical networking, what does DWDM (Dense Wavelength Division Multiplexing) technology allow?

    <p>Increased transmission capacity by multiplexing multiple wavelengths on a single fiber</p> Signup and view all the answers

    What is the main purpose of CPAN (Carrier Packet Access Network) technology?

    <p>Improving packet data transport over carrier networks</p> Signup and view all the answers

    What is an essential feature of OTN (Optical Transport Network) technology in modern telecommunications?

    <p>Enhancing the performance and monitoring of optical networks</p> Signup and view all the answers

    Which statement best describes the function of a directive coupler in an OTDR system?

    <p>Splitting the incoming light signal towards the fiber under test and the reference fiber</p> Signup and view all the answers

    What is the main function of the timer in an OTDR system?

    <p>Producing a voltage pulse to start the timing process</p> Signup and view all the answers

    What technology primarily focuses on providing a high-speed and efficient way of transporting data over optical networks?

    <p>SDH (Synchronous Digital Hierarchy)</p> Signup and view all the answers

    What is a key advantage of DWDM (Dense Wavelength Division Multiplexing) technology compared to traditional optical networking methods?

    <p>Allows multiple signals over a single fiber</p> Signup and view all the answers

    In modern telecommunications, what is one of the main benefits of OTN (Optical Transport Network) technology?

    <p>Efficient transport of data</p> Signup and view all the answers

    What is the primary purpose of CPAN (Carrier Packet Access Network) technology in telecommunications?

    <p>Enabling high-speed data transport over optical networks</p> Signup and view all the answers

    What is the main function of the OTDR technique in optical networks?

    <p>Measuring fiber attenuation using backscattered light</p> Signup and view all the answers

    Why is the backscatter effect important in optical fiber networks?

    <p>It allows for measuring fiber attenuation</p> Signup and view all the answers

    What is the structure of an OTDR system composed of?

    <p>A light source and a receiver connected to a data processing unit</p> Signup and view all the answers

    In optical fibers, what is Rayleigh scattering primarily responsible for?

    <p>Causing losses in the fiber due to light scattering</p> Signup and view all the answers

    Which technology focuses on high-speed data transport over optical networks?

    <p>DWDM (Dense Wavelength Division Multiplexing)</p> Signup and view all the answers

    What is the principle behind the transmission of information in optical fiber communication?

    <p>Information is encoded into light signals.</p> Signup and view all the answers

    In the context of optical communication, what is the primary focus of SDH (Synchronous Digital Hierarchy)?

    <p>Improving synchronization of digital data transmission.</p> Signup and view all the answers

    What advantage does DWDM (Dense Wavelength Division Multiplexing) technology offer compared to traditional optical networking methods?

    <p>Higher capacity for transmitting multiple signals over a single fiber.</p> Signup and view all the answers

    What is the main role of CPAN (Carrier Packet Access Network) technology in telecommunications?

    <p>Facilitating efficient transportation of data over optical networks.</p> Signup and view all the answers

    How is information transmitted through optical fiber communication?

    <p>In the form of light following a specific sequence.</p> Signup and view all the answers

    What is the purpose of a variable range marker in an OTDR system?

    <p>To measure the length of the fiber</p> Signup and view all the answers

    In OTDR systems, what does the horizontal scale help in determining?

    <p>Range of the fiber</p> Signup and view all the answers

    What is the purpose of providing up to five markers in an OTDR system?

    <p>To measure several points simultaneously</p> Signup and view all the answers

    What type of technology focuses on providing a high-speed and efficient way of transporting data over optical networks?

    <p>OTN (Optical Transport Network)</p> Signup and view all the answers

    Which technology specifically addresses WDM applications and was introduced in the mid-1990s?

    <p>DWDM (Dense Wavelength Division Multiplexing)</p> Signup and view all the answers

    What is the main focus of SDH (Synchronous Digital Hierarchy) technology in telecommunications?

    <p>Handling and transporting data streams synchronously</p> Signup and view all the answers

    In the context of optical communication, what does NGSDH stand for?

    <p>Next Generation Synchronous Digital Hierarchy</p> Signup and view all the answers

    What does CPAN (Carrier Packet Access Network) technology primarily focus on?

    <p>Handling voice and data traffic efficiently</p> Signup and view all the answers

    What is a key benefit of OTN (Optical Transport Network) technology in modern telecommunications?

    <p>Efficient data transmission over optical networks</p> Signup and view all the answers

    Which statement best describes DWDM (Dense Wavelength Division Multiplexing) technology?

    <p>Specifically addresses WDM applications in telecommunications</p> Signup and view all the answers

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