data voice and video cabling
data - ANS-Facts and statistics collected together for reference or analysis
fiber optics - ANS-signals carried by light beams over glass fibers
infrared transmission - ANS-A form of wireless transmission where signals are sent as
pulses of infrared light.
Power line carrier network - ANS-sending data signals over regular power lines
NEC code requirements - ANS-article 725 covers class 1,2,3,or 4 remote-control,
signaling, and Power-limited circuits. all articles covered by this can be confusing if you
don't understand that articles 1,2,3,and 4 can be either power-limiting or signaling
circuits
CLASS 1 NEC code - ANS-CURCUITS supplied by a source that has an output of more
than 30 volts AC or DC and 1000 volt-amperes/watts
CLASS 2 NEC CODE - ANS-CURCUITS that are inherently limited in capacity they may
require np overcurrent protection.
CLASS 3 NEC CODE - ANS-similar to class 2 circuits
CLASS 4 NEC CODE - ANS-class 1 circuits are class 4 circuits that are isolated and
are used for process control instrumentation.
power-limited - ANS-a circuit that has a self-limited power level.
remote-control and signaling curcuits - ANS-1,2,3,4 circuits that do not have limited
power rating.
supply side - ANS-same thing as line side this term is used instead of line side to avoid
confusion.( It refers to power circuits rather than the power that simply feeds the circuit.
attenuation - ANS-is the loss of signal power over the length of a cable. decimals/ feet.
Impedance - ANS-opposition to alternating currents
, reflection/impedance - ANS-If Impedance does not remain constant then data can
reflect back down a cable.
what is the most common element of attenuation - ANS-mutual capacitance
bit - ANS-error rate
cross-talk - ANS-picking up of signal in one cable from a second nearby cable / cable
picking up noise.
foil shields - ANS-stops cress-talk by absorbing magnetic fields
how to eliminate cross-talk - ANS-foil shields, twisted pairs twisted at different rates, and
balance transmission cables.
what is the Most common network cable - ANS-UTP cable standardized by TIA-568
What is the most used cable in France? - ANS-screened twisted pair
what cable may become obsolete ? - ANS-shielded twisted pair
what cables are used for Ethernet ? - ANS-Coaxial cables
What is the top preforming cables.? - ANS-Optical fiber cables
what is the major reason to have mobile terminals connected to a network? - ANS-the
frequent moving of large cables in an office or home.
why are wireless networks not completely wireless?. - ANS-because we need connect
the antenna's to the network backbone. And need to power it.
What are the 3 Major problems with wireless networks? - ANS-1. standards(because
standards are continually changing) 2( bandwidth can be slow) 3security(Internet is
always pray to attacks from hackers and keeping up with this is a never-ending problem
may have to due with how well you hook up your router).
what is Infrared Light transmission - ANS-Transmitting data by the use of light. wave
pulses.
data - ANS-Facts and statistics collected together for reference or analysis
fiber optics - ANS-signals carried by light beams over glass fibers
infrared transmission - ANS-A form of wireless transmission where signals are sent as
pulses of infrared light.
Power line carrier network - ANS-sending data signals over regular power lines
NEC code requirements - ANS-article 725 covers class 1,2,3,or 4 remote-control,
signaling, and Power-limited circuits. all articles covered by this can be confusing if you
don't understand that articles 1,2,3,and 4 can be either power-limiting or signaling
circuits
CLASS 1 NEC code - ANS-CURCUITS supplied by a source that has an output of more
than 30 volts AC or DC and 1000 volt-amperes/watts
CLASS 2 NEC CODE - ANS-CURCUITS that are inherently limited in capacity they may
require np overcurrent protection.
CLASS 3 NEC CODE - ANS-similar to class 2 circuits
CLASS 4 NEC CODE - ANS-class 1 circuits are class 4 circuits that are isolated and
are used for process control instrumentation.
power-limited - ANS-a circuit that has a self-limited power level.
remote-control and signaling curcuits - ANS-1,2,3,4 circuits that do not have limited
power rating.
supply side - ANS-same thing as line side this term is used instead of line side to avoid
confusion.( It refers to power circuits rather than the power that simply feeds the circuit.
attenuation - ANS-is the loss of signal power over the length of a cable. decimals/ feet.
Impedance - ANS-opposition to alternating currents
, reflection/impedance - ANS-If Impedance does not remain constant then data can
reflect back down a cable.
what is the most common element of attenuation - ANS-mutual capacitance
bit - ANS-error rate
cross-talk - ANS-picking up of signal in one cable from a second nearby cable / cable
picking up noise.
foil shields - ANS-stops cress-talk by absorbing magnetic fields
how to eliminate cross-talk - ANS-foil shields, twisted pairs twisted at different rates, and
balance transmission cables.
what is the Most common network cable - ANS-UTP cable standardized by TIA-568
What is the most used cable in France? - ANS-screened twisted pair
what cable may become obsolete ? - ANS-shielded twisted pair
what cables are used for Ethernet ? - ANS-Coaxial cables
What is the top preforming cables.? - ANS-Optical fiber cables
what is the major reason to have mobile terminals connected to a network? - ANS-the
frequent moving of large cables in an office or home.
why are wireless networks not completely wireless?. - ANS-because we need connect
the antenna's to the network backbone. And need to power it.
What are the 3 Major problems with wireless networks? - ANS-1. standards(because
standards are continually changing) 2( bandwidth can be slow) 3security(Internet is
always pray to attacks from hackers and keeping up with this is a never-ending problem
may have to due with how well you hook up your router).
what is Infrared Light transmission - ANS-Transmitting data by the use of light. wave
pulses.
