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WorksheetsUnit 3 - Fiber Optic Cabling - Pretest
Total questions: 20
Worksheet time: 11mins
Fiber-optic cable uses _____ instead of electrical energy to transmit data.
radio waves
microwaves
light pulses
satellite transmissions
Which of the following is not a benefit of fiber-optic cable over copper-core cable?
increased security
less cost
higher bandwidth
immune to electromagnetic interference
A(n) _____ wave is a form of energy that behaves like a wave and can travel through a vacuum.
radio
sound
surface
electromagnetic
Which is NOT a common wavelength for fiber-optic communication?
850 nanometers
1100 nanometers
1300 nanometers
1550 nanometers
From the innermost portion moving outward, the order of fiber-optic cable elements are _____.
glass or plastic core, cladding, buffer, sheath
glass or plastic core, sheath, buffer, cladding
glass or plastic core, buffer, cladding, sheath
glass or plastic core, buffer, sheath, cladding
Major causes of attenuation in fiber-optic cable can be characterized as scattering, dispersion, extrinsic losses, and _____.
crosstalk
interference
Fresnel reflection loss
magnetic induction
What is the difference between scattering and dispersion?
Scattering is the loss of signal strength due to impurities in the core material; dispersion is the distortion of a light wave pattern as it reflects off the core cladding.
Scattering is due to the refraction property differences in the core material; dispersion occurs when intervening material absorbs some of the signal.
Scattering is loss of signal strength due to physical factors outside the core; dispersion is the loss of signal strength due to impurities in the core material.
Scattering occurs due to an improper termination; dispersion occurs due to a poorly spliced cable.
Which of the following is not an example of extrinsic loss?
splices
connectors
bends
induction
Th e broad classifications of fiber-optic cable based on the diameter of the core are _____ and _____
graded-index, step-index
step-index, multimode
mulitmode, single-mode
graded-index, multimode
Classifications of fiber-optic cable based on the design of the cable core are _____ and _____.
graded-index, step-index
step-index, single-mode
single-mode, graded-index
multimode, single-mode
Gigabit Ethernet is defined by the IEEE _____ standard.
802.3a
802.3g
802.3z
802.11
10 Gigabit Ethernet is defined by the IEEE _____ standard.
802.3a
802.3x
802.3z
802.3ae
In 10GBaseLW cabling, the LW refers to _____.
light wave
lingering wavelength
long wavelength
link wave
Which of the following describes a standard developed by ANSI that employs fiber-optic cable over great distances?
10GBaseW
FDDI
RAID
Extranet
Fiber Distributed Data Interface is structured as _____ rings
2
3
4
5
If all rings fail in a Fiber Distributed Data Interface structure, communication is continued at the next _____.
network
node
user
termination point
Th e most common styles of fiber-optic cable connectors are SC, ST, FC, LC, and _____.
RJ-45
RJ-11
MTRJ
F-type
_____ is an organization that provides certification for fiber-optic technicians.
CompTIA
TIA
ASCII
BICSI
Which of following describes the joining of two fiber-optic cores with heat to melt the materials together?
termination
cleaving
fusion splice
mechanical splice
A(n) _____ is a device for testing and troubleshooting long runs of fiber-optic cable.
tone generator
optical time domain reflectometer
digital mulimeter
punch down tool
