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Chapter3

True/False
Indicate whether the statement is true or false.
 

 1. 
The strength of an electrical signal is directly proportional to its frequency.
 

 2. 
Modulation can be used to make a signal conform to a specific pathway.
 

 3. 
Ethernet is an example of a baseband system found on many LANs.
 

 4. 
Latency occurs when a signal traveling on one wire or cable infringes on the signal traveling over an adjacent wire or cable.
 

 5. 
The maximum distance a signal can travel and still be interpreted accurately is equal to a segment’s maximum length.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 6. 
The distance between corresponding points on a wave’s cycle is called its ____.
a.
amplitude
c.
phase
b.
frequency
d.
wavelength
 

 7. 
A digital signal composed of a pulse of positive voltage represents a ____.
a.
0
c.
4
b.
1
d.
8
 

 8. 
The byte 00001110 means ____ on a digital network.
a.
3
c.
14
b.
6
d.
30
 

 9. 
In modulation, a simple wave called a ____ wave, is combined with another analog signal to produce a unique signal that gets transmitted from one node to another.
a.
carrier
c.
information
b.
data
d.
FM
 

 10. 
When signals are free to travel in both directions over a medium simultaneously, the transmission is considered ____.
a.
simplex
c.
half-duplex
b.
multiplex
d.
full-duplex
 

 11. 
____ is a technology used with fiber-optic cable, which enables one fiber-optic connection to carry multiple light signals simultaneously.
a.
Statistical multiplexing
b.
WDM (wavelength division multiplexing)
c.
TDM (time division multiplexing)
d.
FDM (frequency division multiplexing)
 

 12. 
The data transmission characteristic most frequently discussed and analyzed by networking professionals is ____.
a.
noise
c.
throughput
b.
scalability
d.
cost
 

 13. 
One of the most common transmission flaws affecting data signals is ____.
a.
noise
c.
throughput
b.
attenuation
d.
latency
 

 14. 
The most significant factor in choosing a transmission method is its ____.
a.
noise
c.
throughput
b.
attenuation
d.
latency
 

 15. 
The more twists per foot in a pair of wires, the more resistant the pair will be to ____.
a.
throughput
c.
cross talk
b.
attenuation
d.
latency
 

 16. 
Modern LANs use ____ or higher wiring.
a.
Cat 3
c.
RG-6
b.
Cat 5
d.
RG-59
 

 17. 
Serial refers to a style of data transmission in which the pulses that represent bits follow one another along a ____ transmission line.
a.
long
c.
secondary
b.
short
d.
single
 

 18. 
____ describes a popular serial data transmission method.
a.
EIA/TIA Commercial Building Wiring Standard
b.
EIA/TIA RS-232 (Recommended Standard 232)
c.
EIA/TIA 568A standard
d.
EIA/TIA 568BA standard
 

 19. 
Which connector is used in RS-232 transmissions?
a.
DB-25
c.
BNC
b.
ST
d.
Cat-5
 

 20. 
In a ____ cable, the usual wire positions are exactly reversed in one of the two RJ-45 terminations.
a.
crossover
c.
straight-through
b.
cross-through
d.
rollover
 

 21. 
Which term describes the hardware that makes up the enterprise-wide cabling system?
a.
wiring board
c.
network diagram
b.
patch panel
d.
cable plant
 

 22. 
Which standard is also known as structured cabling?
a.
TIA/EIA Commercial Building Wiring Standard
b.
TIA/EIA RS-232 (Recommended Standard 232)
c.
TIA/EIA 568A Standard
d.
TIA/EIA 568BA Standard
 

 23. 
The points where circuits interconnect with other circuits is known as ____.
a.
entrance facilities
c.
IDF (intermediate distribution frame)
b.
cross-connect facilities
d.
telecommunications closet
 

 24. 
Which term identifies a room containing connectivity for groups of workstations in its area?
a.
MDF (main distribution frame)
c.
work area
b.
entrance facilities
d.
telecommunications closet
 

 25. 
____ describes wiring that connects workstations to the closest telecommunications closet.
a.
Backbone wiring
c.
Work area
b.
Horizontal wiring
d.
Simple wiring
 

 26. 
Many network problems can be traced to poor cable ____ techniques.
a.
manufacturing
c.
installation
b.
engineering
d.
planning
 



 
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