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WGU C172 Network & Security focused on Chapter 3 Exam Review Questions and A Level Marking Scheme Latest 2024/2025 $11.49   Add to cart

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WGU C172 Network & Security focused on Chapter 3 Exam Review Questions and A Level Marking Scheme Latest 2024/2025

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WGU C172 Network & Security focused on Chapter 3 Exam Review Questions and A Level Marking Scheme Latest 2024/2025 zero-dispersion wavelength - correct answer point where the dispersion is actually zero dispersion compensating fiber - correct answer acts like an equalizer, cancelling disper...

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  • November 2, 2024
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KieranKent55
WGU C172 Network & Security focused on
Chapter 3 Exam Review Questions and A Level
Marking Scheme Latest 2024/2025


zero-dispersion wavelength - correct answer point where the dispersion is actually
zero


dispersion compensating fiber - correct answer acts like an equalizer, cancelling
dispersion effect and yielding close to zero dispersion in the 1550 micron region


fiber bragg grading - correct answer a short strand of modified fiber that changes the
index of refraction and minimizes the intersymbol interference


optical spectrum - correct answer light frequencies from the infrared on up


2 types of light sources in fiber optic communication - correct answer DL (diode laser)
and LED (light-emitting diode)


preferred light source in moderate to wideband systems - correct answer DL


advantages of LED - correct answer - cheaper
- less complex circuitry
- needs no thermal or optical stabilizations


DFB - correct answer - Distributed Feedback Laser
- a more stable laser suitable for use in DWDM systems


DWDM - correct answer - Dense wavelength division multiplex

, - incorporates the propagation of several wavelengths in the 1550 nm range for a single
fiber


VCSEL - correct answer - Vertical cavity surface emitting lasers
- Lasers with the simplicity of LEDs and the performance of lasers


tunable laser - correct answer - a special class of laser where the wavelength can be
adjusted by a few nanometers
- ideal for traffic routing in DWDM systems


Terms used to describe fiber optic strand - correct answer - fiber
- light pipe
- glass


isolator - correct answer an inline passive device that allows power to flow in one
direction only


RSL - correct answer - received signal level
- the input signal level to an optical receiver


branching devices - correct answer used in simplex systems where a single optical
signal is divided and sent to several receivers such as point-to-multipoint data or CATV
Distribution System


splitters - correct answer used to split or divide the optical signal for distribution in a
number of places


wavelength division multiplexers - correct answer - combine or divide 2 or more optical
signals with different wavelengths
- aka optical beam splitters

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