©BRIGHTSTARS EXAM SOLUTIONS
11/17/2024 10:19 AM
Network and Security Foundations WGU
Exam Study Guide.
Basic elements of a fiber-optic communication plan - answer✔fiber, optical light source,
photosensitice detection, efficient optical connection
Advantages of fiber optics - 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 - answer✔850 nm
1310 nm
1550 nm
1600-1625 nm
What part of an optical fiber carries the light - answer✔the core of an optical fiber carries the
light
What is a measure of fibers light acceptance - answer✔numerical aperture
typical core/cladding sizes in microns for multimode fiber - answer✔50/125um and
62.5/125um
Typical core size for single fiber mode - answer✔7 to 10 um
1|Page
, ©BRIGHTSTARS EXAM SOLUTIONS
11/17/2024 10:19 AM
what are the two key distance limiting parameters in fiber optic transmission -
answer✔attenuation and dispersion
four factors that contribute to attenuation - answer✔scattering, absorbtion, macrobending,
microbending
three types of dispersion - answer✔modal, chromatic, polorazation mode
two light sources used in fiber optic - answer✔diode laser
light emitting diode
max length of multimode fiber - answer✔2km
max length of single mode fiber - answer✔80km
EIA - answer✔electronics industries alliance
TIA - answer✔Telecommunications industry association
six subsystems of a structured cabling system - answer✔building entrance
equipment room
backbone cabling
telecom closet
horizontal cabling
work area
Permanent networking cabling within a building - answer✔horizontal cabling
cross=connect - answer✔a space where one or more cables connect to one or more cables or
equipment
main cross-connect - answer✔usually connects two or more building
ISP and teleco usually connect to which room in the campus heirarchy - answer✔Main cross
connect
what is WO - answer✔work area
it is the area where the horizontal cross connect terminates
2|Page
, ©BRIGHTSTARS EXAM SOLUTIONS
11/17/2024 10:19 AM
length limitation for individual cable from telecom closet to networking device - answer✔100
meters
general rule for cable to run from telecom closet to work area - answer✔90meters
RJ-45 # of pins - answer✔8
Difference between Cat5 and Cat5e - answer✔Cat5e is enhances and can carry 1000mbps
cat5 is only 100mbps
data rate of ethernet - answer✔10mbps
fast ethernet data rate - answer✔100mbps
what improvements do CAT6 and CAT7 offer - answer✔each provides maximum bandwidth so
improved data rates
data rate for gigabit ethernet - answer✔1000Mbps
benefits of shielded twisted pair cabling - answer✔reduces potential for electromagnetic
interference
is UTP or STP preffered by the industry - 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 - answer✔two different standards for wiring modular
connectors
X on the input to a hub meaning - answer✔indicates a cross connect point
straight vs cross-connected input ports - answer✔Tx-Tx Rx-Rx straight
Rx-Tx Tx-Rx crossed
UTP link test - answer✔tests the cable from one cablde termination to another
NEXT performance - answer✔Larger numbers are better
Delay screw - 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
3|Page
11/17/2024 10:19 AM
Network and Security Foundations WGU
Exam Study Guide.
Basic elements of a fiber-optic communication plan - answer✔fiber, optical light source,
photosensitice detection, efficient optical connection
Advantages of fiber optics - 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 - answer✔850 nm
1310 nm
1550 nm
1600-1625 nm
What part of an optical fiber carries the light - answer✔the core of an optical fiber carries the
light
What is a measure of fibers light acceptance - answer✔numerical aperture
typical core/cladding sizes in microns for multimode fiber - answer✔50/125um and
62.5/125um
Typical core size for single fiber mode - answer✔7 to 10 um
1|Page
, ©BRIGHTSTARS EXAM SOLUTIONS
11/17/2024 10:19 AM
what are the two key distance limiting parameters in fiber optic transmission -
answer✔attenuation and dispersion
four factors that contribute to attenuation - answer✔scattering, absorbtion, macrobending,
microbending
three types of dispersion - answer✔modal, chromatic, polorazation mode
two light sources used in fiber optic - answer✔diode laser
light emitting diode
max length of multimode fiber - answer✔2km
max length of single mode fiber - answer✔80km
EIA - answer✔electronics industries alliance
TIA - answer✔Telecommunications industry association
six subsystems of a structured cabling system - answer✔building entrance
equipment room
backbone cabling
telecom closet
horizontal cabling
work area
Permanent networking cabling within a building - answer✔horizontal cabling
cross=connect - answer✔a space where one or more cables connect to one or more cables or
equipment
main cross-connect - answer✔usually connects two or more building
ISP and teleco usually connect to which room in the campus heirarchy - answer✔Main cross
connect
what is WO - answer✔work area
it is the area where the horizontal cross connect terminates
2|Page
, ©BRIGHTSTARS EXAM SOLUTIONS
11/17/2024 10:19 AM
length limitation for individual cable from telecom closet to networking device - answer✔100
meters
general rule for cable to run from telecom closet to work area - answer✔90meters
RJ-45 # of pins - answer✔8
Difference between Cat5 and Cat5e - answer✔Cat5e is enhances and can carry 1000mbps
cat5 is only 100mbps
data rate of ethernet - answer✔10mbps
fast ethernet data rate - answer✔100mbps
what improvements do CAT6 and CAT7 offer - answer✔each provides maximum bandwidth so
improved data rates
data rate for gigabit ethernet - answer✔1000Mbps
benefits of shielded twisted pair cabling - answer✔reduces potential for electromagnetic
interference
is UTP or STP preffered by the industry - 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 - answer✔two different standards for wiring modular
connectors
X on the input to a hub meaning - answer✔indicates a cross connect point
straight vs cross-connected input ports - answer✔Tx-Tx Rx-Rx straight
Rx-Tx Tx-Rx crossed
UTP link test - answer✔tests the cable from one cablde termination to another
NEXT performance - answer✔Larger numbers are better
Delay screw - 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
3|Page
