Description : For safety, you should never ____________________ at the end of an optical fiber unless you know it is not connected to a light source.
Last Answer : look
Description : With optical fiber, ____________________ light is more common than visible light.
Last Answer : infrared
Description : A ____________________ diode is the usual light source for single-mode cable.
Last Answer : laser
Description : FDDI stands for Fiber ____________________ Data Interface.
Last Answer : Distributed
Description : FITL stands for Fiber In The ____________________.
Last Answer : Loop
Description : FTTC stands for Fiber To The ____________________.
Last Answer : Curb
Description : Good connections are more critical with ____________________-mode fiber.
Last Answer : single
Description : The optical fiber is not free to move around in a ____________________ cable.
Last Answer : tight-buffer
Last Answer : loose-tube
Description : In multimode fiber, ____________________ index has less dispersion than step index.
Last Answer : graded
Description : Optical fiber relies on total ____________________ reflection.
Last Answer : internal
Description : Dense ____________________ allows many different wavelengths of light to share a cable.
Last Answer : WDM
Description : A ____________________ diode is the usual light detector for single-mode
Last Answer : PIN
Description : The quantum of light is called the ____________________.
Last Answer : photon
Description : Why are visible-light LEDs not used for fiber optics? ∙ a. It has high losses ∙ b. It has short wave ∙ c. It has low attenuation ∙ d. It has weak signal
Last Answer : ∙ a. It has high losses
Description : How can modal dispersion reduced entirely? ∙ A. Use a graded index fiber ∙ B. Use a single-mode fiber ∙ C. Use a monochromatic light source ∙ D. Use a very sensitive light detector
Last Answer : Use a single-mode fiber
Description : Chromatic dispersion can be eliminated by __________. ∙ A. using a monochromatic light source ∙ B. using a very small numerical aperture fiber ∙ C. using a graded-index fiber ∙ D. using a very sensitive photo detector
Last Answer : A. using a monochromatic light source
Description : Light rays that are emitted simultaneously from an LED and propagated down an optical fiber do not arrive at the far end of the fiber at the same time results to ∙ A. intramodal dispersion ∙ B. pulse length dispersion ∙ C. modal dispersion ∙ D. wavelength dispersion
Last Answer : D. wavelength dispersion
Description : In SONET, SPE stands for synchronous payload ____________________.
Last Answer : envelope
Description : SONET frame rows contain path overhead and ____________________ overhead.
Last Answer : transport
Description : The number of path overhead bytes in a SONET frame row is ____________________.
Last Answer : 1
Description : The total number of overhead bytes in a SONET frame row is ____________________.
Last Answer : 4
Description : The number of rows in a SONET frame is ____________________.
Last Answer : 9
Description : The number of bytes in the payload of a SONET frame is ____________________.
Last Answer : 774
Description : The number of bytes in a SONET frame is ____________________.
Last Answer : 810
Description : SONET frames have considerably more ____________________ than do DS frames for information about signal routing and setup.
Last Answer : overhead
Description : The data rate of an FDDI system is ____________________ bps.
Last Answer : 100 M
Description : FDDI uses ____________________ mode cables.
Last Answer : multi
Description : Each ____________________ in an FDDI system acts as a regenerative repeater.
Last Answer : node
Description : The two rings of an FDDI system carry data in ____________________ directions.
Last Answer : opposite
Description : FDDI systems use two ____________________ rings to carry signals.
Last Answer : token
Description : SONET uses a ____________________ to denote the starting position of an information frame.
Last Answer : pointer
Description : SONET does not use bit ____________________ to synchronize two digital signals.
Last Answer : stuffing
Description : The OC-1 line rate is ____________________ Mbps.
Last Answer : v51.84
Description : Optical amplifiers use a ____________________ laser.
Last Answer : pump
Description : Optical amplifiers use ____________________-doped glass.
Last Answer : erbium
Description : SONET stands for ____________________ Optical Network.
Last Answer : Synchronous
Description : WDM stands for ____________________-division multiplexing.
Last Answer : Wavelength
Description : SDH stands for Synchronous Data ____________________.
Last Answer : Hierarchy
Description : Dispersion can be expressed in units of ____________________ rather than
Last Answer : time
Description : For laser diodes, the term ____________________ is used instead of bandwidth.
Last Answer : linewidth
Description : Chromatic dispersion is also called ____________________ dispersion.
Last Answer : intramodal
Description : The numerical aperture is the ____________________ of the angle of
Last Answer : sine
Description : An electron-volt is a measure of ____________________
Last Answer : energy
Description : The ____________________ angle is where refraction changes to reflection.
Last Answer : : critical
Description : The core is surrounded by the ____________________.
Last Answer : cladding
Description : In the core, the angle of incidence equals the angle of ____________________
Last Answer : reflection
Description : When connector losses, splice losses and coupler losses are added, what is the limiting factor? ∙ A. source power ∙ B. fiber attenuation ∙ C. connector and splice loss ∙ D. detector sensitivity
Last Answer : D. detector sensitivity
Description : Which of the following is determined by an OTDR? ∙ a. Distance to trouble ∙ b. Length of fiber ∙ c. Refractive index ∙ d. All of these
Last Answer : d. All of these
Description : EMD is best described by which statement? ∙ A. 70 percent of the core diameter and 70% of the fiber NA should be filled with light. ∙ B. 70 percent of the fiber diameter and 70% of the ... be measured at the output. ∙ D. 70 percent of the unwanted wavelengths should be attenuated by the fiber.
Last Answer : 70 percent of the core diameter and 70% of the fiber NA should be filled with light.