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WGU D315 Network and Security Foundation 2024/2025 Objective Assessment Verified Questions and Answers 100% Graded A+ €22,56
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WGU D315 Network and Security Foundation 2024/2025 Objective Assessment Verified Questions and Answers 100% Graded A+

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WGU D315 Network and Security Foundation 2024/2025 Objective Assessment Verified Questions and Answers 100% Graded A+

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  • 17 februari 2024
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Voorbeeld van de inhoud

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

EIA - (correct answer) electronics industries alliance

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

straight vs cross-connected input ports - (correct answer) Tx-Tx Rx-Rx straight
Rx-Tx Tx-Rx crossed

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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