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WGU Network and Security Foundations Exam 256 Questions with Verified Answers,100% CORRECT
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WGU Network and Security Foundations Exam 256 Questions with Verified Answers
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WGU Network and Security Foundations Exam 256Questions with Verified Answers
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
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