NETWORK AND SECURITY
FOUNDATION 2024/2025 OBJECTIVE
ASSESSMENT VERIFIED QUESTIONS
AND ANSWERS 100% GRADED A+
Basic elements of a fiber-optic communication plan - (correct answer) fiber, optical
light source, photosensitice detection, efficient optical connection
Advantages of fiber optics - (correct answer) bandwidth
immunity to electrostatic interference
elimination of crosstalk
lower signal attenuation
lower cost
safety
no corrosion problem
security
Commonly used wavelengths in fiber-optic systems - (correct answer) 850 nm
1310 nm
1550 nm
1600-1625 nm
What part of an optical fiber carries the light - (correct answer) the core of an optical
fiber carries the light
What is a measure of fibers light acceptance - (correct answer) numerical aperture
typical core/cladding sizes in microns for multimode fiber - (correct answer) 50/125um
and 62.5/125um
Typical core size for single fiber mode - (correct answer) 7 to 10 um
what are the two key distance limiting parameters in fiber optic transmission - (correct
answer) attenuation and dispersion
four factors that contribute to attenuation - (correct answer) scattering, absorbtion,
macrobending, microbending
three types of dispersion - (correct answer) modal, chromatic, polorazation mode
two light sources used in fiber optic - (correct answer) diode laser
light emitting diode
,max length of multimode fiber - (correct answer) 2km
max length of single mode fiber - (correct answer) 80km
TIA - (correct answer) Telecommunications industry association
six subsystems of a structured cabling system - (correct answer) building entrance
equipment room
backbone cabling
telecom closet
horizontal cabling
work area
Permanent networking cabling within a building - (correct answer) horizontal cabling
cross=connect - (correct answer) a space where one or more cables connect to one
or more cables or equipment
main cross-connect - (correct answer) usually connects two or more building
ISP and teleco usually connect to which room in the campus heirarchy - (correct
answer) Main cross connect
what is WO - (correct answer) work area
it is the area where the horizontal cross connect terminates
length limitation for individual cable from telecom closet to networking device - (correct
answer) 100 meters
general rule for cable to run from telecom closet to work area - (correct answer)
90meters
RJ-45 # of pins - (correct answer) 8
Difference between Cat5 and Cat5e - (correct answer) Cat5e is enhances and can
carry 1000mbps
cat5 is only 100mbps
data rate of ethernet - (correct answer) 10mbps
fast ethernet data rate - (correct answer) 100mbps
what improvements do CAT6 and CAT7 offer - (correct answer) each provides
maximum bandwidth so improved data rates
, data rate for gigabit ethernet - (correct answer) 1000Mbps
benefits of shielded twisted pair cabling - (correct answer) reduces potential for
electromagnetic interference
is UTP or STP preffered by the industry - (correct answer) usually UTP because the
benefits of STP are contrasted by the cost of instalation and additional cable
this can change with higher datarates however
difference between T568A and T568B - (correct answer) two different standards for
wiring modular connectors
X on the input to a hub meaning - (correct answer) indicates a cross connect point
UTP link test - (correct answer) tests the cable from one cablde termination to
another
NEXT performance - (correct answer) Larger numbers are better
Delay screw - (correct answer) used when wire lengths of different pairs are
significantly different so that data will arrive at the same time to prevent a distortion of
data
power sum measurements critical for high-speed data communications over UTP -
(correct answer) for high speed internet like gigabit ethernet you need to use all four
wire pairs so there is a need to obtain the combined performance meausrement of all
four wire pairs
the shorter the cable the smaller the + loss - (correct answer) duh
what is 8pc8 and what connector is most associated with it - (correct answer) 8
positions 8 conductor
rj45 is most common connector
limit on bend radius for utp cable - (correct answer) 4 times the diameter because
after that there is attenuation loss
Is high PSNEXT good? - (correct answer) yes it means better cable performance
what is margin db relative to cable measurement - (correct answer) indicates by how
many dB the measured value exceeds the limit
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