BICSI TECHNICIAN- NETCOM - CHAPTER 1 EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED
Three transmission methods are
Symplex, half duplex, full duplex
The choice of a specific transport medium is influenced by 5 economics and technical considerations such as the:
Physical construction, type of...
Three transmission methods are
Symplex, half duplex, full duplex
The choice of a specific transport medium is influenced by 5 economics and
technical considerations such as the:
Physical construction, type of services, topology and size of the network, transmission
path distance, transmission performance characteristics of the cabling.
Twisted pair cable is called balanced cable because:
The physical construction of both conductors and the associated connections transmit
information electrically at the same potential referenced to ground.
Coaxial cable is unbalanced because:
The two conductors in the associated connections transmit information electrically at
different potentials referenced to ground.
__________ current has a rapid increase and decrease of the voltage that cannot
be perceived by the eye.
Alternating or AC
__________ refers to a steady value that does not change the polarity of the
voltage for the direction of the current.
Direct current or DC
A battery is an example of a _____ source.
Direct current or DC
EMI
Electromagnetic interference
EM I can be __________ or __________ to the cable
External or internal
AXT
Alien crosstalk
,What is alien crosstalk?
Other cables, external to the cable, that cause electromagnetic interference.
Five examples of external EMI
Other cables, motors, fluorescent lighting, switching power supplies, powered radio
equipment and antennas
Crosstalk definition
Electromagnetic interference, internal to the cable , that comes from another pair within
the sheath
Two examples of internal electromagnetic interference
Cross talk or coming from the cables shield, screen, or other metallic component that is
improperly bonded and grounded
Net current fields we can directly with __________
Distance
High-current fields weekend with
the cube of the distance (fast)
Shielding is ineffective for __________ but is effective for __________
Net current fields, high-current fields
Frequency defined
The number of cycles a signal is repeated in a given time period.
1 cycle in 1 s = ___ Hz
1
60 cycles in 1 s = _____ Hz
60
1000 cycles in 1 s = _______________
1 kilohertz (kHz)
1 million cycles in 1 s = _____________
1 megahertz (MHz)
1 billion cycles in 1 s = ___________
1 gigahertz (GHz)
1 trillion cycles in 1 s = __________
1 terahertz (THz)
, Humans can hear frequencies that range from _____ hertz to _____ hertz
20 Hz to 20,000 Hz
Voice-grade transmission of speech is generally limited to between _____ hertz
and _____ hertz
300 Hz and 3400 Hz
Electrical power measured in watts has two variations known as
Apparent (or reactive) power and true (or real) power
When measured in conjunction with a time element such as seconds or hours
electrical power applies to —
The energy consumed by an electrical device (such as a motor, amplifier, or telephone
transmitter) over a period of time
The energy consumed by an electrical device such as a motor, amplifier, or
telephone transmitter over a period of time is typically measured in __________
Kilowatt hours (kWh)
Power is derived from __________ and __________
Electrical pressure and electrical current
Electrical pressure is usually measured in _____
Volts (V)
Apparent power is a characteristic of a sea electrical units that have __________
components
Reactive
Electrical current is measured in _____
Amperes (A)
Inductors such as transformers and capacitors are examples of
Reactive components
True power is measured in __________
Watts
Power consumed solely by the connected load and any resistive losses in the
associated transmission media is called
True power
Peak power is
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